What was the astronomer Eratosthenes responsible for?
A) calculating that a rotating planet would not be perfectly spherical
B) determining the mass of Earth
C) determining that the Earth has a distinct concentration of high-density material near the center
D) using simple surveying and measurements of shadows in sunlight to estimate Earth's size
Answer: D
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A lake formed of meltwater accumulating along the margin of a glacier:a
pluvial lake d. alluvial fan b. proglacial lake e. outwash c. cirque
Since detection and tracking of hurricanes is now quite accurate, why does damage from these storms continue to increase?
A) changes in tidal patterns B) poor forecasts of landfall area C) hurricane intensity is greater D) continued development of coastal areas
Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain most hydrogen atoms?
A) the alkane B) the alkene C) the alkyne D) None, they all contain the same number of hydrogen atoms.
Spaces between sand particles give sandy soilÂ
A. Good drainage B. The ability to store minerals C. The ability to hold water D. Low permeability to water E. Low permeability to air