Which of the following is most porous?
a. sand
b. soil
c. gravel
d. silt
e. clay
E
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Judge the following sentence according to the criteria given below: Chemical dispersant were used as part of the clean up of the BP Deepwater Horizon oil disaster BECAUSE the dispersants are considered less toxic to marine life than the oil
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct but the reason is incorrect. D) The assertion is incorrect but the reason is correct. E) Both the assertion and the reason are incorrect.
A joint can be distinguished from a fault in that ________
A) there is wider separation between two sides B) joints are a feature of cold climates exclusively C) there is no difference between joints and faults D) there is no movement along joints E) joints are not found in metamorphic rocks
Why is the amount of carbon dioxide dissolved in seawater much less than the theoretical maximum
saturation level? a. Carbon dioxide is very soluble in water. b. Carbon dioxide is able to form a weak acid when combined with seawater. c. Carbon dioxide is quickly used by photosynthetic organisms. d. Carbon dioxide moves quickly from the atmosphere to the ocean
Humans benefit from the persistent rise and fall of tides because they can be used as a source of
A) fresh water. B) coal. C) electricity. D) sediment.