A rock with very low porosity will most often have a
A. large proportion of open spaces.
B. low permeability.
C. very high density.
D. high permeability.
Answer: B
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What created Earth's moon?
a. The initial big bang expansion event b. The formation of a new star c. Ejection of rocky mantle material from Earth after a collision with a smaller planet d. The collision of two older moons e. Ejection of rocky mantle material following an explosive volcanic event on Earth
Which of the following is TRUE about Earth's atmosphere?
A) It is denser at higher altitudes. B) It allows gamma rays and X-rays reach the surface. C) The ozonosphere and ionosphere shield the surface from harmful radiation. D) Variable gases are the dominant gases in the atmosphere.
One approach to cleaning up oil spills may be to use microorganisms that "eat" oil.
Answer the following statement true (T) or false (F)
The induction explanation for lightning
A) is criticized by some scientists for not allowing enough time for the transfer of charge from ice crystals to hailstones. B) assumes that the upper atmosphere has a positive charge. C) assumes the transfer of electrons from ice pellets to ice crystals. D) is criticized by some scientists for not taking into account that the electrical field is too strong.