The most accurate radiometric dates are obtained from ____________________ rocks. Only in very
unusual circumstances can ____________________ rocks be radiometrically dated. Fill in the blank(s) with the appropriate word(s).
igneous, sedimentary
igneous, metamorphic
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Atmospheric scientists often measure gases in parts per million by weight (ppm). If CO2 is currently 0.04% of the atmosphere, the level expressed in parts per million is
A) 4 ppm. B) 4000 ppm. C) 400 ppm. D) 0.004 ppm.
Compared to the windward side, the leeward side of a mountain range will most likely have
A) lower levels of transpiration and precipitation. B) higher levels of precipitation and lower levels of transpiration. C) higher levels of humidity. D) lower levels of sunshine.
If a marine animal has body fluids that have a lower salt content than the surrounding seawater, water will pass through the animal's body tissues from the ________ to the ________ because of ________.
A. outside; inside; osmosis B. outside; inside; electrolysis C. inside; outside; osmosis D. inside; outside; electrolysis E. None of these is correct; the salt moves, not the water.
It is possible to estimate the flow volume of a 100-year flood on a stream that has only 25 years of flow records.
Answer the following statement true (T) or false (F)