Most of the ionosphere is located in which of the following atmospheric layers?

A. mesosphere
B. stratosphere
C. troposphere
D. thermosphere


Answer: D

Environmental & Atmospheric Sciences

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In the tropical savanna climate, most of the rain falls:

a. in the low-sun season. b. throughout the year. c. in the high-sun season. d. due to orographic uplift.

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An important tool in understanding the actual numerical dates of past geologic events is ________

A) cross-cutting relationships B) unconformities C) depositional rates D) radioactivity E) fossils

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Approximately how many of the earth's people are Muslim?

A) 500 million B) 1.3 billion C) 1.9 billion D) 2.4 billion E) 2.8 billion

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Twilight is the period of diffused light that occurs before sunrise

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences