12.2 quiz

1. An electromagnetic wave is caused by a disturbance in

A) heat
B) a field
C) a material medium
D) the atmosphere

2. Which of the following produce(s) the most EM waves on Earth?

A) artificial lights
B) the energy of distant stars
C) a vacuum
D) the high energy of the Sun

3. Radiation is the

A) motion of a medium caused by EM waves
B) energy that moves as EM waves
C) speed of EM waves in a vacuum
D) conversion of EM waves into kinetic energy

4. In a vacuum, the speed of EM waves

A) depends on the source of the waves
B) always remains constant
C) increases as the amount of energy increases
D) decreases as the waves spread out

5. When microwaves encounter water, they

A) are refracted
B) pass through the water without interacting with it
C) convert electromagnetic energy into heat
D) are reflected in many directions

6. EM waves from this part of the spectrum are used in radar and cell phones.

A) microwaves
B) x-rays
C) ultraviolet light
D) radio waves

7. These EM waves have the highest energy.

A) radio waves
B) x-rays
C) ultraviolet light
D) gamma rays

8. EM waves with frequencies of 1012 Hz or less are considered this type of wave.

A) microwaves
B) radio waves
C) ultraviolet light
D) x-rays

9. This type of EM wave is frequently associated with heat.

A) radio waves
B) infrared light
C) microwaves
D) ultraviolet light

10. The smallest part of the EM spectrum is made up of this type of wave.

A) ultraviolet light
B) microwaves
C) visible light
D) radio waves

11. Waves from the Sun in this part of the EM spectrum can burn your skin.

A) microwaves
B) x-rays
C) ultraviolet light
D) radio waves

12. These EM waves pass through soft tissue but are absorbed by bone.

A) x-rays
B) radio waves
C) microwaves
D) ultraviolet light

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