12.2 quiz

1. An electromagnetic wave is caused by a disturbance in

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

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

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

3. Radiation is the

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

4. In a vacuum, the speed of EM waves

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

5. When microwaves encounter water, they

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

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

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

7. These EM waves have the highest energy.

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

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

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

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

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

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

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

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

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

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