12.2 quiz

1. An electromagnetic wave is caused by a disturbance in

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

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

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

3. Radiation is the

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

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) increases as the amount of energy increases
D) always remains constant

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

7. These EM waves have the highest energy.

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

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

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

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

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

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

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

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

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

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

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

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