Why is the same side of the moon always facing Earth?
a. The gravitational pull
b. The inertia of Earth
c. The length of a solar day in comparison to a lunar day
d. The tidal forces locked the moon's rotation to that of Earth
e. Tidal friction has slowed Earth's rotation
d
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If a cellar is cold, it is usually due to the
A. low air pressure. B. presence of the entity known as cold. C. lack of adequate thermal energy. D. thermal uncertainties.
Radon
A. can become trapped in homes. B. is responsible for most cases of lung cancer. C. is a major problem throughout the world. D. is expensive to remove from buildings.
Mass extinctions at the end of the Ordovician occurred because of ____
a. dramatic changes related to glaciation b. dramatic chemical changes in seawater related to meteorite impact c. increased solar radiation d. decreased solar radiation e. increased volcanism
Tropical savanna is being converted to ________ biome because of overgrazing, loss of grasses and erosion
A) tropical rain forest B) desert C) taiga D) tundra E) paramo