According to most estimates, Earth is approximately
A) 4.6 thousand years old.
B) 4.6 million years old.
C) 4.6 billion years old.
D) 4.6 trillion years old.
C
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There has been legislation designed to encourage protection of wetlands, but funding has been greatly reduced, because ________.
a. the ecosystem services of wetlands has been ignored b. there has been no funding available for any federal projects c. green taxes have been opposed by state governments d. wetlands have little or no economic value e. a system of green taxes is already in place to fund the needed work
What property summarizes a body's tendency to stay in the state of rest or motion?
A. volume B. temperature C. pressure D. acceleration E. inertia
generation after generation, through multiple______________, the two populations become __________ generally similar
a. selective forces b. more c. allopatric speciation d. microevolutionary events e. communicate f. interbreed g. less h. gene pool i. symmetric speciation j. macroevolutionary events
Which of the following is NOT a way to change the porosity of a rock?
A. Cut the rock with fractures. B. Fill the pores with water. C. Deposit natural cement into pores. D. Compact clay and other sediment.