Computer 1

4. Colour the given picture.
Fill Red colour in the left mouse button, blue in
the right button and green in other parts.

New Gateway to Computer Science Book - One 51

Activity Input,Output or Memory
Time

Input: information goes into the computer.
Output:information comes out of the computer.
Memory: information can store.
Write I for input, O for output and M for memory
for each device.

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

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

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

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

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

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

52 New Gateway to Computer Science Book - One

Activity Is it Input or Output?
Time

An input device provides information to the
computer.

An output device displays information for the
user to see, hear and use.

Look at the pictures and circle the correct option.

1. Monitor Input Output

2. Mouse Input Output

3. Printer Input Output

4. Scanner Input Output

5. Speaker Input Output

New Gateway to Computer Science Book - One 53

Project Work

Write any three lines about the monitor.

Write any three lines about the computer mouse.

Write any three lines about the system unit.

Teacher's Signature

54 New Gateway to Computer Science Book - One

Unit4 Understanding
keyboard

Note to Teacher
Prepare some play cards of
different pictures of a keyboard and
demonstrate them in class.
Take the students to the computer
lab and explain them about the keys
of a keyboard.

New Gateway to Computer Science Book - One 55

Look at the given pictures.

Let's Read:
There are various types of
keyboards. They all are used for
typing. A keyboard is a typing
input device. It has various keys.
Some of the keyboard keys are
described below.

56 New Gateway to Computer Science Book - One

Alphabet Keys

A to Z letters of

the keyboard are

alphabet keys.

You can press the

alphabet key and check the output on the screen.

Function Keys

Function keys are
located at the top
of the keyboard. F1,
F2, F3, F4, F5, F6, F7,
F8, F9, F10, F11 and F12 are the function keys of a
keyboard.

Number Keys

Number keys are
from 0 to 9. You can
see these keys below
the function keys.
You can use them to type the numbers.

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Special Keys

Shift key, Spacebar key, Enter key and Back space
key are the special keys of a keyboard.
Uses of some special keys:
Spacebar key

You can use this key
to give space between
the letters or words.
Spacebar key is the
longest key of the keyboard.

Enter key

You can use this key
to type the text from
the next line. When
you press the enter
key, your cursor of the screen moves to the next
line.

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Backspace key

You can use this key to
erase the unwanted text
or word. You can delete
the letters or words one
by one with the help of this key.

Shift key

You can use this key to
type the text in capital
letter. You have to press
‘Shift Key’ and the
alphabet key together to type the text in capital
letter.

Arrow keys

You can use these keys
to move the cursor to
the new place wherever
you like in the text. The
arrow keys show the directions up, down, left and
right.

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Activity Name the following keys
Time

60 New Gateway to Computer Science Book - One

a. Which device is called the typing
input device?

b. Tell the name of any four Score

function keys. ..................
c. Is F10 a function key?
10

d. Which is the longest key of the keyboard?

e. Where are the function keys located?

f. Which key is used to type the text in
capital letters?

g. Which key is used to type the text from
the new line?

h. What is the use of shift key?

i. Name any four arrow keys.

j. For what purpose we can use backspace
key?

New Gateway to Computer Science Book - One 61

Activity
Time

1. Choose the correct answer and fill in the
blanks:

a. The..................... is used for typing
words which can be seen on the monitor.
(keyboard/mouse)

b. The ......................... keys have alphabets from
A-Z. (alphabet/numeric)

c. The................... keys are used to move the
cursor. (arrow/mouse)

d. We use the ...................... key to move to the
next line. (enter / delete)

e. The................... key erase the letter after the
cursor. (delete/backspace)

2. Colour the spelling and write in the missing
letter in the space provided.

a. S ac b r d. Ca sl k

b. De e e. S i t

c. Ba k p ce f. E t r

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Evaluation Time

1. Tell the name of the following keys.

2. Write True for correct and False for wrong
statements.
a. A to Z letters of the keyboard
are number keys.
b. The number keys are 0 to 9.

c. Shift key, spacebar key, enter
key and backspace key are the
special keys of a keyboard.

d. You can use ‘Shift Key’ to give
space between the letters or
words.

New Gateway to Computer Science Book - One 63

e. F1, F2, F3 etc. are the function
keys of a keyboard.

f. The spacebar key is the shortest
key of the keyboard.

g. You can use enter key to type
the text from the next line.

h. The arrow key is used to type
the text in capital letter.

3. Fill in the blanks with suitable word(s).

a. The...................... is the longest key of a

keyboard. [spacebar key / shift key]

b. The buttons of keyboard are called

...................... [keys/ letters]

c. The ...................... helps to type the text from
the new line.
[enter key / delete key]

64 New Gateway to Computer Science Book - One

d. The...................... are used to move the
position of the cursor.
[arrow Keys / print keys]

e. You can use ...................... key to erase the
unwanted text from the word.
[backspace key / line key]

f. F10 , F11 and F12 are the ...................... keys
of a keyboard.
[numeric / function]

4. Complete the following words with
appropriate letters.

a. S ....... E ....... IA ....... KEYS

b. S ....... AC ....... BA .......

c. S ....... IFT

d. EN ....... E .......

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5. Match the following words with the correct

pictures:
Backspace key

Arrow keys

Shift key

Spacebar key

Function key

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6. Answer the given questions:
a. What is a keyboard?

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

b. Name any four special keys.

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

c. What is the use of enter key?

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

d. Name any five function keys.

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

New Gateway to Computer Science Book - One 67

Project Work

Draw the given keys on the space provided.

Shift key Arrow keys

Del key Alt key

Ctrl key Backspace key

68 New Gateway to Computer Science Book - One

Unit 5 Storage
Devices

Note to Teacher
Bring some storage devices in class
room like hard disk, pen drive, memory
card, etc. and demonstrate them in
class.
Take the students to computer lab and
explain how the storage devices are
connected with the computer system.

New Gateway to Computer Science Book - One 69

Dear students,
now, we are going to discuss
about the storage devices
of the computer.

Look at the given pictures carefully.

Pen Drive Hard Disk Compact Disk

Memory Card Blue Ray Disk DVD

70 New Gateway to Computer Science Book - One

Let's Read:
The above pictures are the
popular storage devices. The
storage devices are used to store
the output of the computer. You
can store pictures, movies, songs,
games, files, etc. on storage
devices. Storage devices are also
called secondary memory.

Some storage devices are large
in size but they may store less
data. Some storage devices are
small in size but they may store
more data.

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Let’s compare pen drive and hard disk

Pen drive Hard disk

It is cheaper in cost. It is expensive in cost.

Itisasmallsizedstorage It is a large sized storage

device. device.

It is easy to carry. It is difficult to carry.

It is used to store less It is used to store more

data. data.

Look at the pictures of various types of pen drives.

Look at the pictures of various types of hard disks.

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Memory Card
This is a popular storage device.
This is very small in size than the pen drive.
This can be used in mobile phone and camera

also.
This can be easily carried from one place to

another.
This device also has more storage capacity

than CD and DVD.
Look at the pictures of various types of memory
cards.

CD and DVD
CD stands for Compact Disk and DVD stands

for Digital Video Disk.
CD and DVD both are optical storage devices.
CD is less expensive than DVD.

New Gateway to Computer Science Book - One 73

The storage capacity of CD is very less than
DVD.

Look at the pictures of various types of CD and
DVDs.

Blue Ray Disk
It is an optical storage device.
It looks like both CD and DVD.
It can store more data than CD and DVD.
It is expensive than CD and DVD.
Look at the pictures of some blue ray disks.

74 New Gateway to Computer Science Book - One

a. Name any two storage devices.

b. Which is a very small sized

storage device? Score

c. Which is the largest sized ..................
storage device?
10

d. Is hard disk bigger than pen drive?

e. Is memory card a storage device?

f. What is the full form of DVD?

g. What is the full form of CD?

h. Is keyboard a memory device?

i. Name any two optical storage devices.

j. Is DVD and CD are expensive than Blue
ray disk?

New Gateway to Computer Science Book - One 75

Activity Tick the odd picture

Time

76 New Gateway to Computer Science Book - One

Evaluation Time

1. Name the given storage devices.

2. Write True for correct and False for wrong
statements.
a. Hard disk is a very small sized
storage device.
b. Pen drive is a large sized storage
device.
c. Monitor is a storage device.
d. Pen drive is smaller than hard
disk in size.
e. Hard disk is very cheaper than
pen drive.

New Gateway to Computer Science Book - One 77

3. Re-arrange the name of storage devices from

smaller to larger according to their physical

size.

Compact disk Pen drive

Memory Card Hard Disk

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

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

4. Fill in the blanks with suitable word(s).

a. Storage devices are called ………………..

memory. [secondary / primary]

b. Hard disk is a ………………..storage device
[small/ large]

c. Memory card is a ………………..device
[input / storage]

d. Pen drive is ……………………..than hard

disk. [cheaper / expensive]

78 New Gateway to Computer Science Book - One

e. CD stands for ……………………
[Compact Disk / Colour Disk]

f. You can store music and videos on
………………… [keyboard / memory card]

5. Match the following pictures with their
names.
Pen Drive

Hard Disk

Memory Card

Compact Disk

New Gateway to Computer Science Book - One 79

6. Answer the given questions.
a. What are the uses of storage devices?

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

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

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

b. Name any three storage devices.

(i) ....................................................................................................................................................

(ii) ....................................................................................................................................................

(iii) ....................................................................................................................................................

c. Write in three lines about the hard disk.

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

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

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

80 New Gateway to Computer Science Book - One

d. Write any three points about the memory
card.

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

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

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

e. Write down the full forms.

CD: ....................................................................................................................................

DVD: ....................................................................................................................................

Project Work

Ask to your computer teacher and make
a list of storage devices that he/she is
using.

Teacher's Signature

New Gateway to Computer Science Book - One 81

Unit 6 Starting a
Computer

Note to Teacher
Take your children to the computer
lab and demonstrate them how to
start a computer.
Let your children turn ON and OFF
the computer.

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Students, we had studied in previous units that
there are various electronic devices. Among the
various electronic devices, we discussed more
about the computer. Now, in this chapter, we will
learn how to start the computer.

Let’s learn the following conversations.

Ma'am, I am so eager to open a
computer. Will you teach me how
to start a computer?

Sure, in this unit, I am going
to teach you about it. Listen
carefully.

8 Join the power cable properly 83
with the main electric plug.

8 Check whether all the cables are
connected properly with your
devices or not.

New Gateway to Computer Science Book - One

8 Check whether your monitor is turned ON or
not.

8 If monitor is not ON, then press power button
of the monitor.

8 Press the power button of the
system unit.

8 Wait for a while, then you will
see the first desktop screen as below.

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Oh! Interesting Ma'am, after
opening the computer. I want to
turn it off. Can you tell me, Ma'am?

Sure, I am going to tell
you now.

8 Place your mouse pointer on start
button. or press windows key.

8 Choose shut down option.
8 Now, your computer will turn off.

Remember! After this, do not
forget to turn OFF the main
switch.

New Gateway to Computer Science Book - One 85

Thank you so much, Ma'am.
It is really interesting.

You are welcome! We will learn
more in next chapter.

a. Do you need to turn on the

main switch to work with

computer?

Score

b. Do you need to open the monitor

to work with computer? ..................

5

c. Do we need to shut down the

computer after our work?

d. On which button should you click to

shut down the computer?
e. What is the first screen that you see

after starting a computer?

86 New Gateway to Computer Science Book - One

Evaluation Time

1. Complete the following lines:

a. Join the power cable properly with the main
...........................

b. Check whether all the ........................... are
connected properly with your devices or not.

c. Check whether your .......................... is turned on
or not.

d. If .......................... is not on, then press ....................
of the monitor.

e. Press the .......................... of the system unit.
f. Place your .......................... on start button. or

windows key to shut down the computer.

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2. Who said the following statements? Write.
a. Ma'am, I am so eager to open a computer.

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

b. Check whether your monitor is turn or not.

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

c. Oh! Interesting Ma'am, after opening the
computer, I want to turn it OFF.

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

d. Place your mouse pointer on start button.
or windows key.

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

e. Thank you so much Ma'am. It is really
interesting.

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

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3. Answer the given questions:
a. Write the steps to start the computer.

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

b. How to shut down the computer? Write
with steps.

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

New Gateway to Computer Science Book - One 89

4. Read the following points. Make smile face

for what you should do and sad face for
what you should not do while working with
computer.
a. Eat and drink inside the

computer lab.

b. Press the power button of the
system unit gently.

c. Turn off the computer directly
through the power switch.

d. Report any broken plugs or
exposed electrical wire to your
teacher.

e. Turn off the computer after you
use it.

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Lab Work

Visit computer lab and do the activity as
given below.
1. Check how the computers are

connected with the power source.
2. Check the cable connections.
3. Switch on the computer and try to start

it.

5. Observed the first desktop screen.
6. Make a list of some destop icons.

................ ................ ................
................ ................ ................
7. Turn off the computer and off the
power source.
8. Cover the computer after use.

New Gateway to Computer Science Book - One 91

Unit7 Working with
Calculator

Note to Teacher
Bring some calculators in the class and
demonstrate them to the students.
Take the students to the computer lab
and let them work with the calculator.
Tell the students to do addition,
subtraction and multiplication of two
digits or three digits number with the
help of the calculator program.

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In previous lesson, you learnt
on how to open a computer.
In this lesson, we will learn
about calculator program.

You might have seen the given pictures.

In the above pictures, there are various types
of calculator. Calculators are used for calculations.
You can use them for simple and difficult
types of calculations. Nowadays, we can see
calculator on mobiles, tablets and even in watches.
Each computer has calculator program. You can
open it and do some calculations.

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Let’s learn how to work with calculator.

Click on Start Menu or press the windows key.
Type calculator in search box as given below.

From the list, click on Calculator.
A standard calculator program open as below.

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Some basic symbols of calculator

+ (Plus): You can use this sign for addition.

- (Minus): You can use this sign for
* (Asterisk): subtraction
You can use this sign for
multiplication.

/ (Slash): You can use this sign for division.

= (Equals to): You can use this sign to display
the final calculation.

Let’s learn how to close this program.
Click on the ( × ) sign to close this program as

given below.

Close

New Gateway to Computer Science Book - One 95

Practical Time

Open calculator program.

Practise the given numbers as given in
calculator program and write the result in
the given box.

5+2 = 7+3 =

4+7 = 12 + 16 =

13 + 14 = 20 + 20 + 20 =

11-11 = 12 – 11 =

20 – 10 = 4*4 =

2*2 = 6*4 =

10 / 2 = 5/3 =

12 / 4 = 36 + 44 – 22 =

Close the calculator program.

Shut down the computer.

96 New Gateway to Computer Science Book - One

a. Is the calculator a calculating
device?

b. Can you work with the Score

calculator on the computer? ..................
c. What is the use of plus (+)?
5

d. What is the use of minus (-)?

e. What is the use of Asterisk(*) sign?

New Gateway to Computer Science Book - One 97

Evaluation Time

1. Fill in the blanks:
a. Calculators are used for .........................

b. You can use the calculator for simple
and some ........................................ types of
calculations.

c. Nowadays, we can see the calculator on ....
.............................. tablet and even in watches.

d. Each computer has ..................................
program.

e. To start the calculator program, first, we
have to click on .................................. button.

f. The (+) sign is used for ............................ and
(–) sign used for ............................

98 New Gateway to Computer Science Book - One

2. Write True for correct and False for wrong
statements.

a. The calculator is also a
calculating device.

b. We cannot use the computer for
addition and subtraction.

c. The (+) sign is read as Plus.

d. Slash (/) sign is used for
multiplication.

e. The (-) sign is used for
subtraction.

3. Name the following symbols:

+ : ....................................................................................................................................

- : ....................................................................................................................................

* : ....................................................................................................................................

/ : .................................................................................................................................... 99

New Gateway to Computer Science Book - One

Project Work

Draw a sample of calculater with its
numbers and various symbols.

Teacher's Signature

100 New Gateway to Computer Science Book - One