Grade 5 Illustrated Science Dictionary

Written by,


Teacher Rajathi

This dictionary is written for primary Grade 5

school students based on the SCIENCE DLP DSKP.

It is suitable for primary school students in Year 5

studying Science in English. It contains an

alphabetical list of common words and phrases

applicable to the new Malaysian Curriculum

Science course for Year 5. Colored, labelled
diagram and illustrations, as well as numerous

examples, have been included to aid understanding

and learning.

Section


What is Science ?


Unit 1 : Scientific Process Skills


Unit 2 : Science Room Rules



Unit 3 : Life Processes in Animals


Unit 4 : Life Processes in Plants


Unit 5 : Energy



Unit 6 : Properties of Light


Unit 7 : Electricity


Unit 8 : Heat


Unit 9 : Matter


Unit 10 : Acid and Alkali



Unit 11 : Earth , Moon , Sun


Unit 12 : Technology

















SURVIVAL OF ANIMAL SPECIES

The many ways animals protect their eggs and young :


• Keep their young in their mouths.( Male snake head)
• Feed their young.( Bird)
• Protect their young and eggs from predator.( snake,tiger)
• Lay slimy eggs.(Frog)

• Hide their eggs.( turtle)
• Carry their young in pouches.( Kangaroo)

• Stay in herds.( Elephant)

FOOD CHAIN











A food chain is a linear network of links in a food web starting from

producer organisms and ending at an apex predator species, detritivores,

or decomposer species. A food chain also shows how organisms are

related to each other by the food they eat. Each level of a food chain
represents a different trophic level.

FOOD WEB




A food web is the natural interconnection of food chains

and a graphical representation of what-eats-what in an
ecological community. Another name for food web is

consumer-resource system.





The ways of plant disperse its seed or fruit





SOURCES OF ENERGY

FORMS OF ENERGY







• Lights travels in straight line

• Light travel much faster than sound

• We see things because they reflect light into our eyes

• Shadows are formed when light is blocked by an object

REFLECTION OF LIGHT



























































Reflection is when light bounces off an object. If the surface is smooth
and shiny, like glass, water or polished metal, the light will reflect at the

same angle as it hit the surface. For a smooth surface, reflected
light rays travel in the same direction.

REFRACTION OF LIGHT

The three major categories of energy for electricity generation are

fossil fuels (coal, natural gas, and petroleum), nuclear energy, and
renewable energy sources. Most electricity is generated with steam

turbines using fossil fuels, nuclear, biomass, geothermal, and solar

thermal energy.

Component Function


Dry cell To supply electrical


energy

Wire To connect the circuit


with electrical

components


Bulb To produce light

Switch To complete and break


an electrical circuit



The Brightness Of the Bulb























The more the dry cells used, the brighter the bulb.


Bulb in Circuit 1 will be brighter than the bulbs in circuit 2.



Bulb Arrangement in Parallel and Series circuit





Thermometer





The gaps left between successive rails on a railway track, the reason
is that the rails expand in summer. The gap is provided to allow for this

expansion. If no gap is left, the expansion in summer will cause

the rails to bend sideways. That will result in train accidents.



EXAMPLE OF MATTERS





































PROPERTIES OF SOLID, LIQUID AND GAS



Changes in states of matter






A change of state is a physical change in a matter. They are reversible changes and do
not involve any changes in the chemical makeup of the matter. Common changes of the
state include melting, freezing, sublimation, deposition, condensation, and vaporization.
These changes are shown in the figure given below.





































Five Changes of State

Melting Freezing Evaporation Condensation Sublimation


The process The transition of
The process by by which a The process by The process by the solid phase to
which a which a
the gaseous
substance
substance changes from substance which a substance phase without
changes from the
changes from changes from
the liquid
gaseous phase to
passing the
the solid phase phase to the the liquid phase the liquid phase is intermediate
to the liquid to the gaseous
known as
phase is known solid phase is phase is known condensation. liquid phase is
known as
known as
as melting. as evaporation.
freezing. sublimation.

The Natural Water Cycle




The natural water cycle is the continuous movement of water around the world
through the processes of evaporation, transpiration, condensation,
precipitation, run-off, infiltration and percolation.








































• Evaporation is when the sun shines on water and heats it, turning it into gas called
water vapour which rises into the air.

• Transpiration is when the sun warms people, plants and animals and they release
water vapour into the air.

• Condensation is when the water vapour in the air cools and turns back into a
liquid, forming tiny water droplets in the sky.

• Precipitation is when water droplets fall from the sky as rain, snow or hail.

• Run-off is when water flows over the ground and into creeks, rivers and oceans.
• Infiltration is when water falls on the ground and soaks into the soil.

• Percolation is when water seeps deeper into tiny spaces in the soil and rock.


The water cycle is an extremely
important process because it enables
the availability of water for all living
organisms and regulates weather
patterns on our planet. If water didn’t
naturally recycle itself, we would run out
of clean water, which is essential to life.