Gr.4 Q.2 L.1 Sound and Light

.........................is a type of kinetic energy that is produced by moving particles of a material.

• Chemical energy

• Sound energy

• Nuclear energy

• Stored energy

Sound travels faster through .................

• solid

• gas

• water

• liquid

.......................is the energy of moving particles.

• Chemical energy

• Potential energy

• Stored energy

• Kinetic energy

....................... cannot travel in places with no medium such as

the outer space.

• Rarefactions

• Compressions

• Sound

• Light

....................... is a region of air that have many particles.

• Rarefaction

• Compression

• Energy

• Force

....................... is a region of air that have fewer particles.

• Rarefaction

• Compression

• Energy

• Force

....................... can travel with or without medium.

• Rarefaction

• Compression

• Light

• Force

Nothing can travel faster than ....................... in vacuum.

• Rarefaction

• compression

• Light

• sound

......................... are devices that use light from the sun to produce electricity.

• Seatbelt

• Solar cell

• Doorbell

• Bicycle

......................... is made of a series of compressions and rarefactions.

• Sound

• Light

• Solar cell

• Calculator