A scientific hypothesis may turn out to be right or it may turn out to be wrong. If it is a valid hypothesis, there must be a test for proving it
A) right.
B) wrong.
B
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A ____________________ forms as cold downdrafts along the leading edge of a thunderstorm lift sand or dust into a huge, tumbling dark cloud
Fill in the blank with correct word.
Geologists know that oceanic ridges are geologically very active because they ____.
a. have high heat flow b. have many small earthquakes c. are the site of recent volcanic eruptions d. have many small earthquakes and are the site of recent volcanic eruptions e. all of these
Factors that do not affect the appearance of a coast from the water side include
A) strength of waves and tides. B) size and intensity of storms. C) orientation of the coastline. D) slope of the seafloor. E) All of these affect the appearance.
Which of the following statements concerning unconfined aquifers on barrier islands and atolls is correct?
A) Any salty water in the aquifer will rise if the water table is lowered by pumping. B) The water table must be 40 feet above sea level to keep the salty water in the aquifer below sea level. C) Wells drilled below sea level will produce only saline water. D) Pumping freshwater from one, large capacity well is much less likely to cause salty water to rise in the aquifer than pumping from several, widely spaced, smaller capacity wells.