A
B
C
D
E
100
The main source of light energy on Earth is:
The Sun
100
Things that we dry to last longer are:
fruits, vegetables and salted fish
100
These vehicles use kinetic energy for transportation:
a train , a ship and an airplane
100
Heat energy is produced when objects are .....
rubbed together or when they hit against one another.
100
Give an example of sound energy used for warnings.
hearing a police siren
200
What is a use of light energy in this picture?
communicating
200
A snail at the top of the hill has____ energy 
potential
200
Potential energy of the car in the roller coaster is the greatest at this point:
At point (a) the potential energy is the greatest.
200
Heat energy is used to kill .....
germs by cooking food.
200
Give an example of sound energy used for entertainment.
playing musical instruments.
300
Lasers are used for: 
cutting metals
300
I conserve electrical energy in my house by:
switching off the lights when I leave my room
300
Define heat energy.
Heat energy is a form of energy that makes things warm or hot.
300
Heat energy is used for __________
boiling water.
300
ultrasound is used in____
helps us to see body parts images.
400
A traffic light is used to:
letting us know when it is safe to cross the road
400
Kinetic energy can be used for recreational activities by:
surfing and windsurfing
400
An electric iron provides useful heat for________.
ironing clothes
400
Give an example of sound energy used for informing.
responding to phone calls and listening
400
Explain the energy transformation for an electric lamp.
electrical energy to light and heat energy
500
A device that uses light energy to take photos is:
a camera
500
Wind turbines generate electricity by:
using kinetic energy from wind
500
Heat energy is used in the steel-making industry to _____________________
melt steel
500
Give an example of sound energy used for communicating.
conveying messages through speaking
500
Explain the energy transformation for an electric blender.
electrical to kinetic and sound energy