If the greenhouse effect did not exist, what would happen to earth?
A) Our environment would be greatly improved.
B) Earth would be too wet to support life as we know it.
C) Earth would be too cold to support life as we know it.
D) Earth would be much too hot to support life as we know it.
E) It would make no difference.
C) Earth would be too cold to support life as we know it.
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What is the second most valuable marine resource?
A) Gravel B) Oil C) Gas D) Salt
A block of ice sliding down an incline has its maximum potential energy at
A. half-way down. B. the top. C. a quarter of the way down. D. the bottom.
World-empires in Asia that relied upon large-scale irrigation and drainage schemes for agricultural productivity are known as hydraulic societies
Indicate whether this statement is true or false.
Two main advantages of the EU are:
A) common defense shield and combined navies B) agreement among political parties and erased borders C) common market and euro currency D) religious agreement and lack of terrorism