8.PS4.2 - Class Activity Review

Mechanical vs EM Waves - 8.PS4.2 - Class Activity Review

Multiple Choice

Which color has the longest wavelength?

• Yellow

• Red

• Green

• Purple

Multiple Choice

Which type of light has the lowest frequency (which means the lowest energy) of this group?

• Radio

• Microwave

• Infrared

• Ultraviolet

Multiple Choice

Which of the following has frequencies higher than ultraviolet rays?

• visible light

• infrared rays

• x-rays

Multiple Choice

Which medium will transmit sound the fastest?

• ocean water

• solid iron

• perfumed air

• a sponge

Multiple Choice

Sound is able to travel faster in solids than in air because the molecules in a solid are

• closer together than air molecules

• more easily moved than air molecules

• moving faster than air molecules moving faster than air molecules

• larger than air molecules

Multiple Choice

When a wave transfers all of its energy into the material it strikes

• Absorption

• Diffraction

• Reflection

• Refraction

Multiple Choice

This shows the phenomenon known as....

• reflection

• refraction

• mirrors

• focal point

Multiple Choice

When a wave strikes an object and bounces off (example echo) this is called what?

• medium

• refraction

• reflection

• interference

Multiple Choice

Which of the following represents refraction?

• A

• B

• C

• D

Multiple Choice

Why do we see this apple as red?

• the apple reflects all visible light

• the apple reflects red wavelengths

• the apple absorbs all visible light

• the apple absorbs red wavelengths

Multiple Choice

Screaming into a pillow is an example of sound waves being ______.

• reflected

• refracted

• absorbed