Earth's magnetosphere is generated by
A) nuclear fusion in Earth's core.
B) nuclear fission in Earth's core.
C) dynamo-like motions in Earth's interior.
D) gravitational accretion.
C
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Which one of the following best illustrates a type of mitigation strategy in response to climate change?
A) Using coal-generated electricity to power electric cars B) Constructing and using wind turbines to generate electricity C) Building sea walls to protect low-lying areas from rising sea levels D) Using scrubbers to remove sulfur from coal before burning it to generate electricity
In general, the healthiest soil texture for plants is one in which
A. clay dominates, sands are next highest in concentration, and silt has the smallest concentration. B. there is a relatively even percentage of sand, silt, and clay. C. sand dominates, silts are next highest in concentration, and clay has the smallest concentration. D. sand dominates, clays are next highest in concentration, and silt has the smallest concentration.
The petroleum window is the depth between ________ to ________ feet through which sapropel must pass to transform into oil.
A. 100; 600 B. 10,000; 20,000 C. 500; 6000 D. 100; 1000 E. 7,500; 15,000
With height, wind speed in the atmosphere would ________. With depth, the effect of wind on the water column would ________.
A. decrease; decrease B. increase; decrease C. increase; increase D. decrease; increase