Radioactivity is a tendency for an element or a material to
A. radiate heat.
B. emit radiation.
C. glow in the dark.
D. emit light.
E. emit electrons.
Answer: B
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a. local temperature b. type of vegetation c. wind speed d. the initial cause of the fire e. moisture content of the fuel
If the continents were once joined together, rocks and mountain ranges on the margins of each should have ____
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