Question

first read: concept vocabulary
identify the choice that best answers the question.
what is the most accurate meaning of atmosphere in this sentence?
the atmosphere of the earth consists of 78 percent nitrogen, 21 percent
oxygen, and 1 percent other gases.
a. space
b. chemistry
c. cloud cover
d. surrounding air

Explanation:

The atmosphere is the layer of gases surrounding the Earth. Option D "surrounding air" is the most accurate description as it directly refers to the gases (air) that surround the planet. Options A (space) is incorrect as it is a vast area beyond Earth's atmosphere. Option B (chemistry) is a scientific field, not related to the definition here. Option C (cloud cover) is just a part of the atmosphere's weather - related features, not the whole concept.

Answer:

D. surrounding air