When ice floats in water, a small part of it extends above the surface. Interestingly enough, the volume of ice that extends above the surface is equal to the volume of the
A) water the ice displaces.
B) vast number of open spaces in the hexagonal ice crystals.
C) both A and B
D) neither A nor B
B
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True mammals evolved from ____________________, which were the most mammal-like of group of
____________________, which were mammal-like reptiles. Fill in the blank(s) with the appropriate word(s).
Low pressure areas are associated with converging, ascending air
Indicate whether the statement is true or false
As a general rule, friction is greatest ________
A) near the Earth's surface B) at jet stream altitudes C) near the poles D) near the equator E) at the middle latitudes
One widely accepted hypothesis is that the Earth's magnetic field is created by electric currents within the ________.
A. lower mantle B. liquid outer core C. sun D. asthenosphere E. crust