What will most likely be the best source of new energy resources in the future?

A) hydroelectric
B) oil
C) solar
D) conservation


Answer: D

Environmental & Atmospheric Sciences

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A sample of water that is 99.9999 percent pure contains 0.0001 percent impurities. Consider from Chapter 1 that a glass of water contains on the order of a trillion trillion (1 × 1024 ) molecules

If 0.0001 percent of these molecules were the molecules of some impurity, about how many impurity molecules would this be? A) 1000 (one thousand: 1 × 103) B) 1,000,000 (one million: 1 × 106) C) 1,000,000,000 (one billion: 1 × 109) D) 1,000,000,000,000,000,000 (one million trillion: 1 × 1018)

Environmental & Atmospheric Sciences

Deep ocean trenches are associated with ________

A) rift valleys B) subduction zones C) submarine canyons D) transform faults E) turbidity currents

Environmental & Atmospheric Sciences

After four half-lives, 1/8 of the radioactive parent isotope atoms will remain. Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Approximately what percentage of the earth's land surface is desert and steppe?

A) 20 percent B) 50 percent C) 40 percent D) 30 percent

Environmental & Atmospheric Sciences