Astronomy Ch. 10 17-35

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Question Answer
What is the stratosphere? the part of the atmosphere that absorbs ultraviolet
What is the troposphere? the lowest layer in the atmosphere
Which of the following planets has a stratosphere? earth
Which of the following planets has an exosphere? all of the above
The thermosphere is warm because it absorbs X rays
Ultraviolet light is absorbed in the stratosphere
The ionosphere is a layer of ionized gas that is within the thermosphere and the exosphere
The sky is blue because molecules scatter blue lights more effectively than red light
Sunsets are red because sunlight must pass through more atmosphere then, and the atmosphere scatters even more light at bluer wavelengths, transmitting mostly red light
Convection occurs in the troposphere but not in the stratosphere because lower altitudes of the troposphere are warmer than higher altitudes, unlike in the stratosphere
Radio communication between distant places on Earth is possible because the ionosphere reflects radio signals
There are no aurora on Venus because it lacks a strong magnetic field
What is the difference in meaning between the terms weather and climate? weather refers to short-term variations in conditions, and climate refers to long-term variations in conditions
How is the atmosphere of a planet affected by the rotation rate? faster rotation rates produce stronger winds
Which of the following is not caused by the Coriolis effect on Earth? water going down a drain swirls in opposite directions in the Northern and Southern hemispheres
The strength of the Coriolis effect depends on a planet's size and rotation rate
Which of the following factors could explain a gradual warming trend in a planet's climate? a decreasing albedo
Venus has a high albedo because its surface is covered by clouds
Why doesn't Venus have seasons like Mars and Earth do? its rotation axis is not tilted

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