It Is Difficult to Do Infrared Astronomy at Sea Level

question 202

Multiple Choice

It is difficult to do infrared astronomy at sea level primarily because of what component in Earth's atmosphere?

• A) water vapor
• B) carbon dioxide
• C) ozone
• D) chlorofluorocarbons (CFCs)

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Definitions:

Supination

The outward rotation of the forearm or foot, such that the palm or sole faces upwards or forwards.

Pronation

The inward roll of the foot during normal motion when walking or running, where the outer edge of the heel strikes the ground first and the foot rolls inward.

Muscle Contractions

The process by which muscle fibers produce force and shorten, resulting in movement or maintenance of posture.

Eversion

The movement of turning a body part outward, such as rotating the sole of the foot away from the midline of the body.