When an object vibrates, it produces...

• Sound waves.

• Light energy.

• Heat.

How do we perceive large vibrations?

• As loud sounds.

• As quiet sounds.

How do we perceive small vibrations?

• As loud sounds.

• As quiet sounds.

Sound waves can't travel through a vacuum.

• True.

• False.

Which types of light sources do yo know?

• Artificial and man made.

• Natural and bioluminescense.

• Artificial and natural.

Mark the characteristics of the sound.

• It travels in a straght line.

• It travels in waves.

• It is faster than light.

• It travels quickly, but not as fast as light.

How does the light travel?

• In waves.

• In straight lines, called rays.

• Light doesn't travel.

When does the reflection occur?

• When rays of light are absorbed by an object.

• When rays of light are not absorbed by and object.

Tags

NGSS.MS-PS4-2

What is refraction?

• Is what happens when the light passes through a medium with the same density.

• Is what happens when the light passes through a medium with different density.

Mark the natural heat sources.

• Sun.

• Hairdryer.

• Fire.

• Oven.