How fast do comets travel?
a. about 2 to 3 km per minute
b. about 60 km per minute
c. about 2 to 3 km per second
d. about 60 km per second
e. about 500 km per second
ANSWER: d
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What conditions during the formation of coal may reduce its quality for industrial use?
A) Very high heat and pressure are applied. B) Clay and silt wash periodically through the swamp that formed the coal. C) The swamp that formed the coal floods. D) The coal is formed of mostly green plants and contains very few woody trees.
In what way can human practices contribute to desertification?
A) overgrazing by livestock B) growth of too much crop cover C) growth of trees D) irrigation with rainwater
The deeper a rock is below the Earth's surface ________.
A. the hotter it will be B. the cooler it will be C. has no influence on temperature D. the cooler it will be except near a pluton or magma chamber
A person taking levothyroxine (Synthroid) is at an increased risk for a heat-related illness secondary to:
A) tachycardia. B) hypothalamic suppression. C) an increased metabolic rate. D) lowering of the blood pressure.