The average pH of seawater is about ____
A) 2
B) 5
C) 8
D) 10
C
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Less water is available for evaporation in cities. Why is this so?
What will be an ideal response?
Taken together, labor, capital, technology, entrepreneurship, and land containing raw materials are called
A) factors of consumption. B) comparative advantage. C) terms of trade. D) demand conditions. E) factors of production.
Why is it difficult to determine the level of exposure to a particular toxic chemical that will cause harm to humans?
What will be an ideal response?
How does the rate of seafloor spreading affect the sea level?
A) Faster spreading causes faster subduction, which pulls down continental margins. B) Faster spreading produces broader ridges that displace water and expand the oceans. C) Faster spreading heats up ocean, waters causing them to expand and flood the land. D) They have no effect because the rates of seafloor spreading do not change over time.