A gravity meter can be used to explore for metallic mineral deposits.
Answer the following statement true (T) or false (F)
True
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What is the one long-term effect on crop-eating insects that is caused by the repeated spraying of synthetic pesticides?
A. Genetic resistance to the pesticides B. Extinction of the insects C. Large increases in insect size D. Adaptation by running away
Seawater's density is proportional to pressure, but inversely proportional to ____________. Fill in the blank(s) with the appropriate word(s)
The concentric zone model has 6 rings in it
Indicate whether the statement is true or false.
Which of the following statements about U.S. landfills is true?
A. It is against the law to build anything on an abandoned landfill. B. Landfills should be kept as dry as possible to maintain high biodegradation levels. C. More than three-fourths of the landfills in the United States have been closed since 1988. D. There are more active landfills in existence today than ever before.