Unit 5 Practice Test

Front

What is the speed of sound in different materials?

Back

The speed of sound is higher in solids than in liquids.

Front

What is refraction?

Back

Refraction is the bending of light waves as they travel from one medium to another.

Front

What happens to the pitch of a sound as the source approaches?

Back

The pitch of the sound increases because the sound waves are pushed closer together.

Front

What causes ocean waves to bend as they approach the shore?

Back

The bending of ocean waves is due to refraction, as they slow down in shallow water.

Front

What is the difference between mechanical waves and electromagnetic waves?

Back

Mechanical waves require a medium to travel through, while electromagnetic waves do not.

Front

Define mechanical waves.

Back

Mechanical waves are waves that require a medium (solid, liquid, or gas) to travel.

Front

Define electromagnetic waves.

Back

Electromagnetic waves are waves that can travel through a vacuum and do not require a medium.

Front

What is the relationship between wave speed and medium?

Back

Wave speed varies depending on the medium through which the wave travels.

Front

What is reflection in terms of wave behavior?

Back

Reflection is the bouncing back of a wave when it hits a barrier.

Front

What is diffraction?

Back

Diffraction is the bending of waves around obstacles or through openings.