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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If the continents were once joined together, rocks and mountain ranges on the margins of each should have ____
A)formed under the same conditions and in the same sequence B)formed the same sequences but at different times C)formed under different conditions at different times D)formed different sequences at the same time E)slowed down the process of continental drift
Thick deposits of loess form longitudinal desert dunes
Indicate whether the statement is true or false
Which factor does NOT contribute to the intensity of a wildfire?
a. local temperature b. type of vegetation c. wind speed d. the initial cause of the fire e. moisture content of the fuel
Dust Bowl conditions in the North American Great Plains of the 1930s represented ________
A) something that will not happen again B) changes which occurred because the climate changed C) an identical situation to Hawaii of the late 1920s D) deforestation E) desertification