Presently glaciers cover less than 1% of the earth's surface
a. true
b. false
b
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What is a half-life?
A. It is the time needed until 1/2 of the radiation is gone. B. It is the time it takes for 1/2 of the material to undergo radio decay. C. It is half of the lifetime of the radioactivity in a sample. D. It is the time it takes for 1/2 of the material to decompose. E. all of the above
In calm air, a typical cloud droplet falls over 600 times faster than a typical raindrop.?
a. True b. False
Across the developing world, children are considered an economic investment because they will be able to work and contribute to the family's income.
a. true b. false
The single most important mechanism of transport for weathered overburden in the subarctic zones is ________
A) mass wasting B) frost wedging C) oxidation D) exfoliation E) hydrolysis