The Earth is warm due to ________.
A. greenhouse gases
B. albedo
C. blackbody radiation
D. All are correct.
Answer: A
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Object and image for a plane mirror lie
A. at right angles to each other. B. equal distances from the mirror. C. along the same plane. D. all of the above
Which of the following best matches the description?Measure of toxicity or the dosage that will kill 50% of a tested population.
A. hazardous wastes B. chronic toxicity C. waste minimization D. ignitability E. LD50 F. synergism G. National Priority List H. RCRA I. threshold levels J. acute toxicity K. CERCLA L. Superfund M. toxicity N. reactivity O. corrosiveness
Toxic metals such as lead, cadmium, and mercury
A. Usually don't accumulate in food chains B. Can be toxic if high concentrations are reached C. Are the most common health threat in water D. Can be toxic in extremely small quantities E. Rarely threaten water supplies
Ozone:
A) absorbs ultraviolet light. B) typically reaches its greatest concentrations near the ground and near major cities. C) is very difficult to split into diatomic oxygen and monatomic oxygen. D) exists primarily in the troposphere.