12.2 quiz

1. An electromagnetic wave is caused by a disturbance in

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

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

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

3. Radiation is the

A) speed of EM waves in a vacuum
B) motion of a medium caused by EM waves
C) energy that moves as EM waves
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) decreases as the waves spread out
C) always remains constant
D) increases as the amount of energy increases

5. When microwaves encounter water, they

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

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

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

7. These EM waves have the highest energy.

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

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) ultraviolet light
C) microwaves
D) infrared light

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

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

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

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

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

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

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