WorksheetsGrade 3_Light and Heat energy
Total questions: 20
Worksheet time: 13mins
The main source of light is ...
Sun
Lamps
Stars
Torches
We need ... to help us to see.
Heat
Water
Air
Light
We can see the ball because ...
they reflect light into our eyes.
they reflect heat into our eyes
they reflect light into our ears
they do nothing.
One of the uses of light from the sun is
Make food for plants
Float things
Keep burning
Fill things up
Reading with too little light can damage our eyes.
True
False
Exposing our skin to too much light from the Sun can cause ...
skin burn and skin cancer
health skin
make beautiful
The edge of the leaf may turn yellow or brown happen because ...
Get too much light
Get less of light
The light of sun is used by plants to ...
make food
see
walks
The uses of light based on the picture is ...
For controllling traffic
For producing pictures
For warning
For decorating
2. There are many sources of heat in our homes. Which one is the BEST example of heat energy?
stove
can opener
blender
TV set
What is energy?
It is the ability to do work
The rate at which work is done
The rate at which energy is transferred
2.A cell or battery is a source of _______________.
circuit
electricity
flow
5.It is safe to put the plugs of many appliances in one socket.
True
False
Electricity can come from batteries or __________.
an electric power station
a handphone
an airplane
a laptop
Coal can be used as a source of _________.
wind power
water power
better roads
electricity
