Underlying magnetism are electrons that
A. spin on their axes.
B. revolve around the nucleus.
C. both of these
D. neither of these
Answer: C
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Global warming threatens coral reefs because
A. warm temperatures prevent corals from hunting for food. B. warm temperatures cause the shells of corals to dissolve. C. the bacteria that cause coral bleaching thrive when temperatures are warm. D. corals eject the dinoflagellates that live within their tissues when seawater temperatures are too high.
Low-energy coastlines are commonly found in areas along eastern edges of continents
a. True b. False
A hurricane's most important source of energy is solar radiation on its cloud tops
Indicate whether the statement is true or false
A geostationary satellite takes pictures of
a. ?the moon as it is seen from Earth. b. ?other planets as they are seen from Earth. c. ?different areas on Earth when it is stationary. d. ?one area on Earth as it moves at the same rate as Earth’s spin. e. ?any recurring geologic event on Earth.