STD 9 ENG

Activity Card Physics Class : 9

Impulse
Impulse of force is the product of the force and the time.

Impulse Force x time (F x t)

Impulse

Impulse m (v-u)
Impulse mv - mu
Impulse
Change in momentum

Activity 3

When a force is applied on a body of mass 10 kg for a period of 4 s, the velocity of the body
changes from 6 m/s to 8 m/s.

a) What is the initial momentum of the body?

.........................................................................

b) What is the final momentum of the body?

.........................................................................

c) What is the change of momentum of the body?

.........................................................................

d) What is the rate of change of momentum of the body?

.......................................................

.......................................................

e) What is the force applied on the body?

.......................................................

.......................................................

f) What is the impulse experienced by the body?

.......................................................

.......................................................

g) What is the relation between impulse and change in momentum?

.......................................................

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

Activity 4

Newton’s third law of motion.
To every action there is an equal and opposite reaction.
Find out the action and reaction from the given situations.
1. When rowing a boat
Action : ...........................................................................
Reaction :............................................................................
2. A bullet is fired from a gun
Action : ...........................................................................
Reaction :............................................................................
3. A man jumps from a boat to the shore.
Action : ...........................................................................
Reaction :............................................................................
Activity 5

Law of conservation of momentum
In the absence of an external force, the total momentum of a system is a constant.
Observe the figure

a) Move the first marble slightly back and roll it forward. What happens?
............................................................................................................

b) Bring the two marbles together and let them roll. What happens?
............................................................................................................

c) Write the name of the law related to this phenomenon
............................................................................................................

d) Write the practical definition of the law.
............................................................................................................
............................................................................................................
............................................................................................................

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

Unit 4 - Gravitation

Activity 1

If the mass of the earth is M, R its radius and m is the
mass of an object placed on the surface of the earth.

The force of attraction between them is

Points A and C represents different positions on the
surface of the earth. Point B represents the centre of the earth.
a) At which point on the surface of earth does a body experience maximum weight?

b) At which point does the body experince zero weight?

c) Does the weight of an object increase or decrease as it moves from A to C?

d) What is the reason why the weight of objects vary in different places on the surface of the
earth why?
.........................................................................................................................................
.........................................................................................................................................

Activity 2

Weight of a body is the force with which the
earth attracts the body towards its centre.

a) Identify the figures and write down the usage
of each.

(a)

(b)

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

b) The reading shown by one of the above devices is always the same in different places of
earth’s surface.
Name the device?........................................................................
Justify your answer.......................................................................

c) What is the weight of an object of mass 50 kg on Earth and on the Moon?
(Value of g on Earth 9.8 m/s2, value of ‘g’ on moon = 1.62 m/s2)
Weight in earth :............................................................................
Weight in moon :............................................................................

Activity 3
The force of attraction between two objects with masses m1 and m2 at a distance is

a) If the distance between two objects of a given mass is halved, what is the change in force of
attraction between them?

b) Complete the table below

Mass of the bodies Distance between Mutual Force
the bodies (m) of attraction
m1(kg) m2(kg)

12 5 2 G x .(.i.)..............
(.i.i.)...........
50 5 G x 40
(i.i.i..)...... 15 0.5 G x 600

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

Activity 4
When a body is allowed to fall from a certain height, it falls to the earth due to the force of gravity.
This is free fall.
a) Write a situation from our daily life as an example for free fall.

.........................................................................................................................................................................
.
b) Why does an object experience weightlessness while freefall?

..........................................................................................................................................................................

..........................................................................................................................................................................

c) When one coin and a feather are dropped from a height at a place where there is no air.
Which object will reach the ground first?
..........................................................................................................................................................................
..........................................................................................................................................................................
..........................................................................................................................................................................

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

Unit 5 - Work, Energy and Power

Activity 1
Work is said to be done only when a body undergoes displacement in the direction of the applied
force.
W = Fs
a) A force of 100 N is applied continuously on a body. If the body undergoes a displacement of
20 m. Find out the magnitude of the work done by the force?

.......................................................................................................................................

......................................................................................................................................

b) An object resting on a floor is dragged, it is displaced in the direction of force applied. What
is the force that causes negative work, when it is dragged through the floor?

Activity 2

Energy is the capacity to do work
 Kinetic Energy – The energy possessed by a body by virtue of its motion.
 Potential Energy – The energy possessed by a body by virtue of its position.
 Law of conservation of Energy – Energy can neither be created nor destroyed.
Energy can only be transformed from one form to another.

a) Energy conversion in certain equipment when they are being operated are given in the
table. Complete the table.

Sl. No Equipment Energy transformation
1. Electric bulb Electrical Energy —> (i)..........................
2. Fan (ii)..................... —> Mechanical Energy
3 (iii)................................. Mechanical Energy —> Electrical Energy
4 Electric Iron box Electrical Energy —> (iv)...............................

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

b) The Potential Energy acquired by a coconut on the top of a coconut tree is due to its
position. Write down two other situations in which objects acquired potential energy.
(i) ......................................................................................................
(i) ......................................................................................................

c) A motorbike of mass 200 kg is moving with a velocity of 40 m/s. What will be its Kinetic
energy?

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

Unit 6 - Current Electricity

Activity 1
Ohm’s Law
When temperature remains constant, the current through a conductor is directly proportional
to the potential difference between its ends.

a) Complete the table below based on ohm’s Law.

Voltage (V) Current I Resistance R

20 (i).................. 5

(ii)................... 8 2

12 3 (iii)...................
b) Select the graph representing Ohm’s Law.

V V
(i) I (ii) I

.......................................................
V

(iii) I SCERT

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA

Activity Card Physics Class : 9

Activity 2 B C
Arrange the colums suitably Ohm meter
m
A Ampere 
Resistance Coulomb C
Electric charge A
Ohm
Current
Resistivity

A B C

Resistance
Electric charge

Current
Resistivity

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

Unit 7 – Wave Motion

Activity 1
Wave motion is the propagation of disturbances, produced in one part of a medium to the other
parts by the vibration of its particles.

Characteristics of waves
Amplitude a The maximum displacement of a particle from its mean position.
Wave length  The distance advanced by the wave by the time a particle
completes one vibration.
Period  Time taken for a particle in a medium to make one complete vibration.
Frequency  The number of vibrations in one second.
Speed of wave  The distance travelled by the wave in one second.

Observe the graph

displacement AB CD EF G

distance (m)

The time taken by the wave to travel from A to G is 2 s.

a) What is the amplitude of the wave?
......................................................................

b) What is its wave length?
......................................................................

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Physics Class : 9

c) What is the speed of the wave?

d) What is the frequency of the wave?

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card Chemistry Class :IX

CHEMISTRY

9

General Education Department Samagra Shiksha, Kerala SCERT

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

UNIT - 1
STRUCTURE OF ATOM

Activity - 1

Bohr model is helpful in giving a lucid explanation to the features of an atom.
According to Bohr Model, the revolving paths traced by electrons are called orbits
(shells)

Main ideas of the Bohr Model are given. Fill in the blanks

 Electrons revolve around the nucleus of an atom in fixed paths called orbits or shells
 .....................................................................................................................................

.....................................................................................................................................
 .....................................................................................................................................

....................................................................................................................................
 .....................................................................................................................................

........................................................................................................................................
 The shell around the nucleus can be numbered from near to the nucleus as 1, 2, 3, 4,

5.............. or represented by the letters, K, L, M, N, O ............................

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

Activity : 2(a)

The total number of protons in an atom is called its Atomic number. The number of
electrons present in an atom is equal to the number of protons.

Sum of the number of protons and electrons in an atom is known as its Mass
number.

Complete the worksheet given below and answer the following questions

Elements Number of protons/ Atomic Number Mass
Number of electrons number of neutrons number

Lithium 3 3 47

Carbon 6 6 6 ……

Argon 18 ….. 22 ……

Sulphur 16 …… ……. 32

a. Mass number = Number of ____________+ Number of ____________

b. Number of neutrons = (Mass number) -(____________________)

c Atomic number of an atom is 17 and Mass number is 35. Complete the table
related to this element

Number of electrons
Number of protons
Number of neutrons

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

Activity 2(b)
Analyse the Bohr model of atom and complete the table

Atomic number
Mass number
Number of protons
Number of electrons
Number of neutrons
Electronic configuration

ClSymbol is 35
of chlorine 17 . Write the electronic configuration of chlorine and

draw the Bohr model of it.

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

Activity- 3

Isotopes

Atoms of the same element having the same atomic number but different mass
number are called isotopes.

a. Different isotopes of hydrogen are given below. Analyse them and complete the
table.

1 H 12H 3 H
1 1
(Deuterium)
(Protium) (Tritium)

Name of Atom Protium Deuterium Tritium
Number of protons
Number of neutrons
Number of electrons
Atomic number
Mass number

Which is the particle that differs in its number in these atom?

b. Complete the table

Isotopes Uses
Carbon-14
Deuterium
Iodine -131
Uranium -235

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

Activity -1 UNIT-2

CHEMICAL BONDING

The chemical bond formed as a result of the sharing of electrons between the
combining atoms is called a covalent bond.

Analyse the electron dot diagram of the formation of fluorine and oxygen molecules
and answer the following questions given below.

 Octet electronic configuration is acquired in this molecules
By electron transfer / By sharing of electrons

 How many electron pairs are shared among those molecules?

 By what name is this type of chemical bonding known as?

 Nitrogen molecule contains a triple bond. Complete the electron dot diagram

:NN:________

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

Activity – 2
The electronegativity values of some elements are given below

Element Electronegativity

Carbon 2.55
Oxygen 3.44
Sodium 0.93
Chlorine 3.16
Magnesium 1.31

Identify the type of chemical bond formed in the given compounds on the basis of
the electronegativity values of the elements present.

Hint: Generally, if the difference in electro negativity values of elements in a
compound is 1.7 or more, the compound generally shows ionic character
and if it is less than 1.7, the compound generally shows covalent character.

Compounds Difference in electronegativity Nature of
of constituent elements chemical bond

Carbon monoxide 3.44 -2.55 = 0.89 covalent bond
Sodium chloride
Magnesium oxide
Magnesium chloride
Carbon dioxide

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

Activity – 3

Ionic bond is a chemical bond formed by electron transfer. In an ionic bond,
the ions are held together by the electrostatic force of attraction between the
oppositely charged ions.

Analyse the electron dot diagram of the formation of sodium chloride molecule and
answer the following questions.

 Which atom donated the electron? How many?

 Which atom accepted the electron? How many?

 How are the atoms called after they get charged

 Complete the chemical equation related to the formation of sodium chloride

Na ...............ie
Cl 1e ....................

 Positive ions are known as…………………………………………
 Negative ions are known as ………………………………………

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

UNIT-3
REDOX REACTIONS AND RATE OF CHEMICAL REACTIONS
Activity -1

Law of conservation of mass – In a chemical reaction mass is neither created nor destroyed

Balancing of equation: In chemical equation, equalising the number of atoms of each element
in molecules in the reactant side and that in the product side is called balancing of equation.

Analyse the given chemical equations and answer the following questions

(i) S  O2  SO2
(ii) H2  I2  HI
(iii) A1 O2  Al2O3
(iv) CaCO3  CaO  CO2

 Tabulate the number of reactant atoms and that of product atoms in the
chemical equations given above

No Reactant atoms Product atoms

(i) S-1, O-2 S-1, O-2
(ii)
(iii)
(iv)

 Balance the equations which are unbalanced

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

Activity -2
 The process in which the oxidation number increases is called oxidation
 The process in which the oxidation number decreases is called reduction.
 Reducing agent – The atom / substance which undergoes oxidation
 Oxidising agent – The atom / substance which undergoes Reduction
Analyse the following chemical equation and complete the table
2Mg 0  O20  2Mg 2O2
The atom whose oxidation number is increased
The atom whose oxidation number is decreased
Oxidised atom
Reduced atom
Oxidising agent
Reducing agent

 Find out the oxidation number of Al in Al2O3

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

Activity -3

Have you read the content of text book page no.58? You may scan QR code in
page no.58 in the text book and watch the video for more clarity. Write the procedure of
the experiment to prove the influence of temperature on the rate of reaction. Write down
your observation also.

Procedure

Observation

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

Activity -1 UNIT - 4
PERIODIC TABLE

Dobereiner Newlands Lavoisier Hentry Mosely Mendeleev

 The table given below lists the contributions and names of scientists who made
earlier attempts in the classification of elements.

Fill in the blanks

Contribution / Findings Name of Scientist

Law of octaves —————————

—————————————— Lavoisier

—————————————— Dobereiner

Morden periodic law —————————

 Similar elements are placed in the same group in mendeleev’s periodic table. This
is one of the merits of mendeleev’s periodic table. Write any two other merits of
Mendeleev’s periodic table.

Merits:

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

Activity -3

Period number = Number of shells

Number of electrons in the Group number
Outermost shell
1
1 2
3+10=13
2 4+10=14
3 5+10=15
4 6+10=16
5 7+10=17
6 8+10=18
7
8

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

 Analyse the following bohr model of an atom and complete the table

Electronic configuration
Period number
Group number
Family
Electronic configuration of noble gas
belonging to same period
Electronic configuration of second
period element belonging to same group

Identify the position of transition elements in the periodic table. Write any two
characteristics of transition elements .

1……………………………………………………………………………….

2……………………………………………………………………………..

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

Activity -3
 On moving from left to right along a period , size of an atom decreases
 As the size of an atom decreases, ionization energy increases.
 As the size of an atom decreases electro negativity increases.

Electronic configuration of a few elements are given (symbols are not real). Analyse them
and fill the following table

Element Electronic configuration

P 2, 8, 7

Q 2, 8, 8

R 2, 8, 1

The period in which these
elements belong
Biggest element
Element having the highest ionization energy
Element having the highest electro negativity
Stable element

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

UNIT - 5

Acids, Bases and Salts

Activity – 1

Some activities are described in the following table. Analyse it and complete the
table.

Activity Observation Inference

2ml of vinegar is
taken in a test tube.
Dip a blue litmns paper
in it.

Take some calcium
carbonate in a boiling
tube, add dilute
hydrochloric acid to it.

Take some water
in a beaker, add
some quick lime
(calcium oxide) and stir it.
Add a drop of red litmus
solution in it

Hint: Blue litmus paper can be made by rubbing the petals of shoe flower on a paper
 Egg shells can be used as calcium carbonate
 Lime juice or vinegar can be used instead of hydrochloric acid

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

Activity - 2

CO2, SO2, and NO2 are nonmetallic oxides. Generally, compounds formed by the
reaction of nonmetallic oxides with water are acidic in nature.

In industrial areas and townships environmental problems like acid rain occurs.
Write a short note on acid rain and the problems arising from it.

Activity - 3
Neutralisation is the process in which an acid and an alkali react with each other to
from salt and water. Salts contain positive ions and negative ions. They dissociate
into ions when dissolved in water.

 Complete the chemical equations given below.

NaOH  HCl  NaCl  _________

 ______________  
NH 4  C1

Ca3(PO4 )2  _________ _________




General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

 The symbols of some positive and negative ions are given in the table. Analyse the
table and find the chemical formaulae of the salts given

Name of positive ions symbols Name of negative ions Symbols

Potassium ion K  Hydroxide ion OH 

Sodium ion Na Carbonate ion CO 2
3

Calcium ion Ca2 Nitrate ion NO 
3

Ammonium ion NH  Sulphate ion SO 2
4 4

(i) Potassium nitrate

(ii) Calcium hydroxide

(iii) Ammonium sulphate

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

UNIT - 6

NON METALS

Activity -1

Some chemicals and apparatus are given in the box. Analyse this and complete
the worksheet given below.

Test tube, potassium permanganate, zinc, dilute HCl,
spirit lamp, moisture free boiling tube, match box , stand

a. Hydrogen
Chemicals and apparatus required

Procedure

b. Oxygen
Chemicals and apparatus required

Procedure

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

Activity – 2
Displacement reaction /Substitution reaction

An element in a compound is displaced by another element is called displacement
reaction / substitution reaction.

Example : Zn  2HCl  ZnCl2  H2

Combination reaction
The reaction in which two or more simple substances combine to form a compound

is called combination reaction

Example : 2H2  O2  2H2O  Heat

Decomposition reaction
Decomposition is the process of forming two or more products due to the

decomposition of a compound

Example : 2NaCl  2Na  Cl2

Double decomposition
Double decomposition is a reaction in which two compounds when react with each

other, interchange their ions to form two new compounds

Example : BaCl2  H2SO4  BaSO4  2HCl

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

Some chemical equations are given in the box. Classify them and tabulate.
Zn  CuSO4  ZnSO4  Cu
KCl  AgNO3  AgCl  KNO3
2KClO3  2KCl  3O2
N2  3H2  2NH3
2H 2O2  2H 2O  O2
CaO  H2O  Ca(OH )2
CH 4  Cl2  CH 3Cl  HCl
NaOH  NH4Cl  NaCl  NH4OH

Displacement Combination Decomposition Double
reaction reaction reaction decomposition

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

Activity - 3

The arrangement of apparatus used for the preparation of chlorine in laboratory is
shown below.

Analyse the figure and answer the following questions
Reactants used

Why is chlorine gas
passed through water?

Which is the substance used
to remove water vapour formed
along with chlorine

The colour of chlorine gas

Which is the solution used
to identify chloride salts?

Bleaching of chlorine is an oxidation
reaction. Give reason

Which is the substance formed
when dry chlorine gas is
passed through dry slaked lime

General Education Department Samagra Shiksha, Kerala SCERT

Activity Card Chemistry Class :IX

UNIT - 7

THE WORLD OF CARBON

Activity -1

a. List out the characteristic properties of graphite and diamond from the properties
given in the box.

High thermal conductivity, Grey in colour, conductor of electricity, Non volatile,
very hard, High refractive index.

Diamond Graphite

b. One use each of diamond and graphite are given. Identify the characteristics used
here.
i. Graphite is used to make pencil lead.

……………………………………………………………

ii. Diamond is used for cutting glass

………………………………………………………….

General Education Department Samagra Shiksha, Kerala S.C.E.R.T

Activity Card Chemistry Class :IX

Activity – 2

a. Name the process by which carbon dioxide is utilised by plants?
………………………………………………………………

b. What are the activities in which the amount of carbon dioxide in the air is
increased?

c. Write a short note on the problems related to the tremendous increase in the
amount of CO2 in the atmosphere and its remedial measures

General Education Department Samagra Shiksha, Kerala SCERT

BIOLOGY

9

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

UNIT 1
PROTECTORS OF BIOSPHERE
Concept area – Structure of chloroplast
Activity-1
Analyse the description and illustration given below and answer the questions.

In plants photosynthesis takes place in chloroplast. Stroma is the fluid part which is
seen inside the double membrane of chloroplast. Grana is the pack of membraneous
sacs seen inside the chloroplast. Grana contain pigments like Chlorophyll a, chlorophyll b,
carotene and xanthophyll which can absorb sunlight.
However, only chlorophyll a can participate directly in photosynthesis. All other pigments
absorb light and transfer it to chlorophyll a. Hence chlorophyll b, carotene and
Xanthophyll are called accessory pigments.

Stroma
Grana
Double membrane

a) Identify the following parts and label them in the figure of chloroplast given below.
(i) Part of the chloroplast where pigments are present.
(ii) Fluid part of the chloroplast.

b) All pigments present in the chloroplast can absorb sunlight and can participate
directly in photosynthesis.

What is your opinion on this statement?

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

Concept area –The Chemistry of Photosynthesis

Activity-2
Analyse the description and arrange the given concepts suitably in the table given below:

Photosynthesis which takes place in the chloroplast has two phases. Light phase,
that takes place in Grana and dark phase , that takes place in Stroma.In Light phase
light is used. But for dark phase, light is not required. During light phase water splits
and oxygen is released, hydrogen reaches stroma. In this phase Light energy is
converted to chemical energy and is stored in ATP. During dark phase, energy in ATP

is used to combine hydrogen and carbon dioxide to produce glucose.

 Light is not used.  Glucose is produced
 ATP is Utilized  Light is used.
 Oxygen is released  ATP is formed
 Takes place in Grana  Takes place in Stroma

Light Phase Dark Phase

 ........................  .......................

 ........................  ........................

 ........................  ........................

 ........................  ........................

Concept area- Storage of food in plants

Activity-3

Analyse the description given below and answer the questions related to the storage food in
plants

Glucose produced as a result of photosynthesis is easily soluble in water so it cannot
be stored in plant body .Therefore, they store glucose in the form of insoluble starch in
leaves. Plants utilise starch as a source of energy for life activities and to prepare
substances required for growth. Starch is later converted to sucrose and is transported
through phloem to various plant parts. Glucose undergo chemical changes and is
converted to various other nutrients. The stored food is starchin tubers, protein in

legumes, fat in oil seeds, fructose in fruits, and sucrose in sugarcane.

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

a What is your scientific explanation to the child’s doubt?

If glucose formed as a
result of photosynthesis is
easly soluble in water, can

plants store glucose ?

b Connect the contents given in column A appropriately with the plant parts shown in
colum B using arrow marks.

A B
Stored form of glucose Plant part

sucrose

Protein

starch
fat

fructose

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

UNIT 2
FOOD THROUGH DIGESTIVE TRACT

Concept area: Human digestive system

Activity-4

The food we eat is not
absorbed as such to the body.
Then how these are absorbed
to the body .

What reply can you give to the child's doubt? You know that
the food we eat is converted to simple absorbable form. This
process is called digestion. This process takes place in the
digestive sytem. The following parts are included in the human
digestive system.

• Mouth • Small intestine

• Oesophsgus • Large intestine

• Stomach • Rectum

• Duodenum • Anus

a) Identify the parts labelled in the illustration and write their names in the box

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

b) Complete the flow chart indicating the path of food through the digestive tract

Mouth Duodenum

Anus

Concept Area- Structure of tooth
Activity-5

You know that digestion of food starts in the mouth . Teeth help to masticate food .
Different types of teeth are present in human beings.

Incisor Premolar

Helps to bite and cut the food Helps to grind and chew the
food

Canine Molar

Helps to tear food Helps to grind and chew
the food

Knowing the different functions of teeth help to understand why teeth differ in external
structure. Let us examine if the teeth varying in their morphology show similarities in their
internal structure?

Enamel: White colour, hardest part, dead tissue

Dentine : Living tissue which forms the teeth

Pulp: Soft connective tissue seen in the pulp
cavity; blood vessels , lymph ducts and nerve
fibres are seen

Cementum: Calcium containing connective tis-
sue that holds the tooth in the socket of the gum

Molars Canine

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

a) Make suitable pairs using the information given in the box.

Premolars, incisor, molar, canine helps to bite and cut the food, helps to tear
the food, helps to grind and chew the food

Model : Premolar- Helps to grind and chew the food
i. ….….........................................................................................................
ii. ….….........................................................................................................
iii. ….….........................................................................................................
b) Identify the parts given below and label them on the diagram writing their names
a) Calcium containing connective tissue
b) Living tissue which forms the tooth .
c) Dead and hardest part

Concept area - Food through the digestive tract
Activity-6

Analyse the reading card and the table and answer the questions.

The digestion of complex nutrients like starch, protein, fat etc in the food we
eat, gets completed due to various processes that takes place at different
parts of the digestive system. Numerous digestive juices are involved in these
processes. Various enzymes present in these digestive juices help in the
digestion of each nutrient.

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

Analyse the table inorder to get idea about digestion of starch, protein, fat etc at different
parts of the digestive system

Part Digestive Starch Digestion of nutrients Fat
juice Protein

Mouth Saliva Converts starch partially No digestion No digestion
to maltose

Stomach Gastric juice No digestion Converts pro- Digests fat
tein partially to partially

peptone

Duodenum Pancreatic Convert starch partially Converts protein Converts fat
juice to maltose partially to pep- into fatty acid
and glycerol
tide

Small Intestinal Converts maltose and Converts No digestion
intestine juice other carbohydrates to peptides to
their simple forms like aminoacids
glucose, fructose and

galactose

a) What are the nutrients which undergo digestion?

...............................................................................................................

b) Name the parts where the digestion of the nutrients given below occur?

i) Starch : .........................................................................................

ii) Protein : .........................................................................................

iii) Fat : .........................................................................................

c) Complete the table using the information given in the box.

Fatty acid, glucose, fructose, galactose, amino acids, Glycerol

Nutrients Simpler components
Starch
Protein
Fat

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

UNIT 3
SIMPLE NUTRIENTS INTO CELLS.

Concept Area: Blood Plasma
Activity-7
Analyse the following reading card and answer the questions.

BLOOD PLASMA
Plasma is the fluid part of blood. It is pale yellow coloured and constitutes 55% of
blood. Blood cells are found in the plasma. 90-92% of plasma is water. 7-8% are
Plasma Proteins. They are Albumin, Globulin, and Fibrinogen. Albumin regulates
blood pressure, Globulin Helps in defence, and Fibrinogen plays a major role in the
coagulation of blood. Other factors like fat, salts, urea, sugar, hormones etc. are also
found in the plasma. The simpler molecules formed as a result of digestion, namely
glucose, amino acids, fatty acids, glycerol etc.,reach cells through the plasma.

a) List out the components conducted through plasma.

b Complete the table. Function
Plasma Protein

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

Concept Area: Human Heart
Activity-8

Figure showing the longitudinal section of the heart is given below.
Analyse the description and diagram and answer the questions.

Left Atrium Aorta
Right Atrium Pulmonary Artey

Right Ventricle Pulmonary
Left Ventricle
Venacava Bicuspid valve
Aortic valve
Pulmonary valve
Tricuspid valve

Human heart works relentlessly like a pump, and blood flows through blood vessels
continuously in all directions. The upper chambers of the heart are left atrium and right
atrium. Lower chambers are left and right ventricles. The blood vessels carry blood to
the heart chambers and vice versa. There are valves between heart chambers and
blood vessels. Valves prevent the backward flow of blood.

a) Complete the table.

Name of Position Function
valve
............................................................................................
Bicuspid valve Between Left Atrium and Left ............................................................................................
Prevents the backward flow of
ventricle. blood from Right ventricle to right
atrium
Tricuspid valve ..................................................................
..................................................................

Aortic valve In between Aorta and left ..................................................................
ventricle. ..................................................................

Pulmonary .................................................................. Prevents the backward flow of
blood from pulmonary artery to
valve ..................................................................
right ventricle.

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

b Complete the illustration by writing down the missing terms.

Venacavae Pulmonary veins

Right Atrium i
ii Left Ventricle

iii iv

Concept Area: Double Circulation.
Activity-9

Complete the Flow chart by analysing the illustration and description.

Venacavae Pulmonary veins

Different Right Atrium Left Atrium
parts of the Right ventricle Left ventricle

body

Lungs

Aorta

Pulmonary Artery

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

The heart beats continuously with a rhythm. When blood flows from the heart to
different parts of the body and vice versa, it passes twice through the chambers of
the heart. Hence the circulation of blood in humans is said to be double circulation.

Double circulation includes systemic circulation and pulmonary circulation. Systemic
circulation starts from the left ventricle and ends in the right atrium. The circulation
which starts from the right ventricle and ends in the left atrium is called pulmonary
circulation.

Systemic Circulation Left
Ventricle
Different
parts of
the body

Right Lungs
Ventricle

Pulmonary Circulation

Concept Area: Transportation in Plants

Activity-10

Analyze the reading passage and complete the activities.

Xylem and Phloem are the vascular tissues in plants. Vascular tissues in plants extend
from the roots to leaves, in an interconnected manner. The water and salts that roots
absorb from the soil reach the leaves through xylem. Phloem Conducts food molecules
prepared in the leaf into different parts of the plant.

Water reach the leaves and other parts of the plant through the xylem due to the combined
action of many processes. Osmosis, Transpiration, Root pressure, Cohesion, and
Adhesion are important among them.

Transpiration reduces the pressure in the cells of leaves. In order to compensate this
pressure difference, water enters these cells from adjacent cells through osmosis. The
transpiration pull developed due to transpiration helps to carry water to the top. Cohesion
is the capacity of the water molecules to stick to themselves and adhesion is the capacity
of water molecules to stick to the walls of the vessel and together they help in the
upward movement of the water. Along with these, the root pressure developed due to
the absorption of water by root hairs also help in the smooth raising of water.

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

a Complete the table. Function
Vascular Tissue Transports water

Phloem

b Write short notes on the following.
i Transpiration pull

...............................................................................................................................
...............................................................................................................................
ii Root Pressure
...............................................................................................................................
...............................................................................................................................
iii Cohesion
...............................................................................................................................
...............................................................................................................................
...............................................................................................................................
iv Adhesion
...............................................................................................................................
...............................................................................................................................
...................G..E..N...E..R..A..L..E..D..U...C..A..T.I.O...N...D..E..P.A..R...T.M...E..N..T........S..A..M..A..G...R..A...S.H...IK...S..H..A..,.K...E..R..A..L..A....... S C E R T

Activity Card BIOLOGY Class: 9

UNIT : 4

BREATHING FOR ENERGY

Concept area : Human respiratory system

Activity-11

Energy is required to do any work. This energy is released in the cells. Oxygen is
needed to release the energy. The respiratory system helps to take oxygen from the
atmospheric air into the body.
The following is the illustration showing the parts of the respiratory system and its peculi-
arity and function. Observe the illustration and answer the questions.

Nostril Pleura
An opening through which air passes The double layered protective
in and out of the body. membrane of the lungs. Pleural
fluid seen in between the mem-
Nasal cavity braneous layers prevents friction
The cavity which connects the nos- between lungs and walls of the
trils with the pharynx. thoracic cavity.

Trachea (Wind Pipe) Bronchus
A long tube strengthened by ‘C’ Branches of trachea
shaped cartilaginous rings. Cartilagi- which enter the lungs,
nous rings help trachea to remain supported by cartilagi-
open always. nous bronchial rings.

Bronchiole Diaphragm
The terminal branches of bronchi that The muscular wall that sepa-
open to the alveoli. There are no rates the thoracic and abdomi-
cartilaginous rings in the bronchioles. nal cavities.

Alveoli
Delicate air sacs,elastic in nature, seen
at the tip of bronchioles. These air sacs
are surrounded by a large number of
capillaries. The exchange of gases
takes place here.

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T

Activity Card BIOLOGY Class: 9

a) Complete the table. Peculiarity / Function

Parts of the respiratory system
Nostril
Nasal cavity
Bronchus
Bronchiole
Diaphragm

b) The exchange of gases takes place in the alveoli. To what extent is the structure of
alveoli suitable for this?

c) Respiratory tract is the pathway of atmospheric air from the nostrils to
the alveoli.

Complete the illustration showing the pathway of air.

Atmospheric Air Nostrils

Alveoli

GENERAL EDUCATION DEPARTMENT SAMAGRA SHIKSHA, KERALA S C E R T