The outermost gases of early Earth were initially destroyed by radiation from the sun, but the
underlying atmosphere remained intact. Indicate whether the statement is true or false.
ANS: F
The layer of gases that the sun stripped was Earth's first atmosphere. There were other gases which
were released from the interior of the planet to form a secondary atmosphere. Information can be
found in the section Earth, Ocean, and Atmosphere Accumulated in Layers Sorted by Density.
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This is a collection of languages related through a common ancestral language that existed long before recorded history
A) Language group B) Language family C) Language branch D) Language sets E) None of the answer choices are correct.
Subsidence inversions form because when a layer of air sinks: a. the upper part warms but the lower part cools
b. the entire layer cools. c. the upper part compresses and warms more than the lower part. d. the lower part compresses and warms more than the upper part.
Which association is incorrect?
A) mesocyclone — region of tornado formation B) tornado watch — a tornado has been sighted on the ground C) downdraft — precipitation D) anvil - front of the thunderstorm
A lake classified as euthrophic has high nutrient content
Indicate whether the statement is true or false