Which type of physical weathering occurs because of freeze-thaw cycles?
A. wedging
B. mineral growth
C. unloading
Answer: A
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All of the following contribute to high levels of air pollution in countries like China and India EXCEPT
A. they have large cities. B. the pollution from vehicles is poorly regulated. C. the pollution by industry is poorly regulated. D. poor people use wood and dung to cook and heat homes.
Coral and barnacles are both arthropods due to their hard outer exoskeletons
Indicate whether the statement is true or false
The only substance found naturally in the lower atmosphere that can exist as a solid, a liquid, and a gas is ____
A) carbon dioxide B) water C) methane D) ozone
The Red River of the North flows into Hudson Bay, part of the North Atlantic Ocean. What kind of watershed does the Red River drain?
A) large B) closed C) open D) oceanic E) small