How many calories must be removed from 5 g of pure water at 10°C to convert the water to ice?
A. 80
B. 450
C. 20
D. 1200
E. 800
Answer: B
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Eratosthenes' measurements of Earth's size involved
A. a deep well in Syene. B. surveying the distance between Alexandria and Syene. C. a pillar's shadow in Alexandria. D. all of the above
Species with a steady death rate throughout life are characterized by
A. Type I survivorship. B. Type II survivorship. C. Type III survivorship. D. none of the above
A ball is thrown upward and caught when it comes back down. Neglecting air resistance, the speed with which it is caught is
A) more than the speed it had when thrown upward. B) less than the speed it had when thrown upward. C) the same as the speed it had when thrown upward.
What type of rock do caves most commonly form in?
a.) limestone b.) gneiss c.) shale d.) granite