Energy in the Atmosphere Answers

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1
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Which lists three parts of sunlight that make up some of the visible spectrum?

A
green, blue, indigo
B
infrared, red, orange
C
ultraviolet, infrared, electromagnetic
D
violet, ultraviolet A, ultraviolet B
2
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Why is the sky orange and red at sunrise and sunset?

A
Gases absorb orange and red light.
B
Blue wavelengths are absorbed by the atmosphere.
C
The thick atmosphere scatters all but longer wavelengths.
D
Only short wavelengths are radiated from the Sun in the morning and evening.
3

How do the magnetic and electrical components of electromagnetic waves travel in relation to each other?

A
at right angles
B
toward each other
C
in a circular motion
D
parallel to each other
4

How does convection occur in the troposphere?

A
The Sun’s rays heat Earth’s surface.
B
Warm air rises and cool air sinks.
C
The warm ground heats the air above it.
D
The Sun’s electromagnetic waves reflect off clouds.
6

What causes different colors to appear in the sky?

A
the absorption of light by air molecules
B
the reflection of light by bodies of water
C
the greenhouse effect in Earth’s atmosphere
D
the scattering and reflection of light by dust particles
7

What happens to the particles of a substance as its temperature increases?

A
They move faster.
B
They move slower.
C
They lose some energy.
D
They move in a circular direction.

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