Diatoms have one of the most efficient energy conversion rates known, using approximately 55% of absorbed sunlight
a. True
b. False
True
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The best way to reduce waste is to stop it at its source. Which of the following results in source reduction?
A. taking your own carrier bag with you when shopping B. purchasing large containers of laundry detergent C. reducing the amount of packaging D. All of these are correct.
All of the following sites was characterized by active volcanism in the Pleistocene except
a. the Cascade Range. d. the Sierra Nevada. b. Yellowstone National Park. e. the Appalachian Mountains. c. Lassen Peak
A(n) ________ is a widely accepted explanation for a phenomenon that is based on evidence and experimentation
A) hypothesis B) scientific fact C) scientific theory D) test E) observation
Even at high elevations where cirrus clouds are found, liquid water still exists in the clouds
a. True b. False