The most essential compound needed to sustain life as we know it is ________
A) ozone
B) carbon dioxide
C) carbohydrates
D) oxygen
E) water
E
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Most folding of rocks occurs near the surface. Indicate whether the statement is true or false
The solar constant is
A. only about a quarter of all energy emitted by the sun. B. the same value for all planets, even Neptune. C. the same for a sphere or for a circle. D. consistent amount of energy received at the top of the atmosphere.
Which type of coal is typically found associated with tight, highly folded strata?
A) Bituminous B) Lignite C) Peat D) Anthracite
Which of the following best describes the Freeze Separation Method for desalination?
A) A current is run through positive and negative electrodes in freshwater separated by semipermeable membranes from seawater. B) Large icebergs are brought to coastal waters off countries that need freshwater where they are melted. C) Saltwater is boiled and the water vapor is passed through a cooling condenser, where it condenses as freshwater. D) Seawater is frozen and thawed multiple times, with the salts washed from the ice between each thawing. E) Water on the salty side of a semipermeable membrane is pushed under high pressure through the membrane to the freshwater side.