Summer and Winter Constellations Are Different Because

question 8

Multiple Choice

Summer and winter constellations are different because

• A)of the spin of the Earth about its polar axis.
• B)the night sky faces in opposite directions in summer and winter.
• C)of the tilt of the Earth's polar axis.
• D)the Earth is at the solar perigee in winter and apogee in summer.
• E)the universe is symmetric.

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Definitions:

Ozone

A molecule made up of three oxygen atoms that occurs naturally in the Earth's stratosphere and protects life by absorbing ultraviolet radiation.

Troposphere

The troposphere is the lowest layer of Earth's atmosphere, extending from the Earth's surface up to about 8 to 15 kilometers, where most weather phenomena occur.

Human Health

The state of complete physical, mental, and social well-being, not merely the absence of disease or infirmity.

Acid Rain

Precipitation with a lower pH than normal, caused by emissions of sulfur dioxide and nitrogen oxides from industrial processes and vehicles, which can harm ecosystems and human-made structures.