Exam 2: Solar Energy, Seasons, and the Atmosphere

While standing at the Tropic of Cancer, Emma's shadow points north at noon (sun time). Based on this, which of the following can be $\underline { \text { definitely } }$ concluded?

The Sun produces more gamma rays than Earth.

The two most abundant gases in the atmosphere are

The principal gases of the homosphere (by volume) are nitrogen, helium, and argon.

Directly above the midlatitudes, the tropopause (-57 degrees

The $\underline {\text { lower } }$ the pH of a liquid

Which of the following are affected by the loss of ozone?

The plane of Earth's orbit about the Sun is called

Which of the following have been correlated with sunspot cycles?

The solar constant is measured at

The region of the atmosphere that is so evenly mixed that it behaves as if it were a single gas is the

Temperatures within the stratosphere

Rotation is Earth's motion on its axis; revolution is its motion about the Sun.

The Clean Air Act saved about ________ lives in 1990.

Astronauts deployed a solar wind measuring experiment on the Moon because

The reaction of automobile exhaust and ultraviolet light

Sources of natural variable gases and materials include all of the following except

During the process by which energy is produced inside of stars

O₃ in the lower troposphere

All places on Earth receive the same period of day and night on March 21.