What is a benefit of ash and lapilli ejections?
A) They produce highly fertile soil in tropical regions.
B) They contain extremely valuable minerals.
C) The chemicals cause extremely important rainfall in tropical regions.
D) They often rid farms of pests.
Answer: A
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How would this stream interact with groundwater?
A) Groundwater would flow into the stream, adding water.
B) The stream would lose water as water in the stream flows sideways and up.
C) The groundwater and stream water would not interact.
D) The stream will only contain water if it is raining at that time.
____________________ provide the only record of prehistoric life. Fill in the blank(s) with the appropriate word(s)
The headwaters of a stream are where it empties to local or ultimate base level.
Answer the following statement true (T) or false (F)
The thickness of deep-sea sediments increases with distance from a spreading center.
a. true b. false