Unit Test — Unit test Answers

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Why are temperatures more moderate around the fall and spring equinoxes?

The angle at which Earth’s axis tilts changes.

Neither end of Earth’s axis is tilted toward the Sun.

The north end of Earth’s axis is tilted toward the Sun.

The Earth briefly wobbles on its axis.

What most likely caused the ice ages?

the size of tree rings and the amount of pollen grains

solar flares and gassy ejections from the Sun

the tilt of the Earth’s axis and the shape of its orbit

the temperatures of the Sun and moon

What happens during the fall in September?

The Sun is at its highest point in the sky.

The northern end of Earth’s axis is tilted toward the Sun.

The Northern Hemisphere receives minimal daylight hours.

The Sun’s rays are not as concentrated as in summer.

Which describes a way that prevailing winds control precipitation totals in a region?

They cause oceanic winds to carry water vapor.

They force cool, moist air from oceans to rise as it moves toward land.

They increase the occurrence of droughts in the winter.

They reduce rainfall on the leeward side of a mountain.

What negative effect occurs when there is a decrease in air quality?

faster evaporation of water in the soil

the drying out of fertile land, resulting in dust bowls

the melting of glaciers and polar ice caps

increased illnesses that result in a decrease in population

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