Paleoclimatic analyses of Earth's rocks tell of extreme variations and changes in world temperature and precipitation throughout geologic time.
Answer the following statement true (T) or false (F)
True
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Groundwater pollution is most often and most effectively treated in situ, which minimizes the risk of spreading the pollution.
Answer the following statement true (T) or false (F)
When sea levels rise,
A) fresh water on Earth also increases and streams are generally more full. B) fresh water on Earth has flowed into the oceans, so streams are generally less full. C) base levels of river profiles where they reach the sea fall. D) base levels of river profiles where they reach the sea rise.
An effusive eruption ________, whereas an explosive eruption ________
A) results from magma produced by subducting oceanic plates; originate in the asthenosphere and upper mantle B) produces composite volcanoes; is an outpouring of low-viscosity magma onto the ground C) is a violent eruption of magma, gas, and pyroclastics; produces shield volcanoes D) is an outpouring of low-viscosity magma onto the ground; is a violent eruption of magma, gas, and pyroclastics E) produces composite volcanoes; produces shield volcanoes
When a heavy stone thrown straight up reaches the top of its path, its velocity is
A. zero and its acceleration is 10 m/s2. B. 10 m/s and its acceleration is zero. C. 10 m/s and its acceleration is 10 m/s2. D. zero and its acceleration is zero.