A mantle hot spot has generated a long-lived plume beneath Yellowstone National Park, and the North American continent is moving ________ above it about 2 to 4 cm/yr.
A. southwestward
B. northwestward
C. in random directions
D. southeastward
E. northeastward
Answer: A
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Which of the following provides the minimum amount of protection you need to block the following form of radiation?alpha
A. lead suit B. suntan lotion C. thick leather D. T-shirt E. none of the above
The Earth is about 4.6 billion years old.
Answer the following statement true (T) or false (F)
Which of the following statements regarding streams and groundwater is NOT true?
A. groundwater baseflow is what allows streams to keep flowing during dry periods. B. infiltrating water contributes to the supply of groundwater. C. when the water table is higher than a stream channel, groundwater flows into the stream. D. when a stream goes dry it means the adjoining aquifer will also go dry. E. when the water table becomes lower than a stream channel, the stream can run dry.
Satellites can be used by scientists to detect changes in ____.
A. water quality B. groundwater supplies C. aquifer density D. water demand E. irrigation efficiency