12.2 quiz

Hauen laguntzarekin: Howard

1. An electromagnetic wave is caused by a disturbance in

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

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

4. In a vacuum, the speed of EM waves

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

5. When microwaves encounter water, they

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

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

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

7. These EM waves have the highest energy.

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

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

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

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

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

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

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

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

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

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

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

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