Where is the problem of air pollution most severe? rural areas urban areas mountain areas coastal areas?

If you were standing on the South Pole at the time of the autumnal equinox, where would you expect the Sun to be at midday?

Which of the following is a way that humans speed up the process of erosion? a. urban development b. hiking c. deforestation d. all of the above

I'm 1999__and__germany began a process of reunification

Which of these are found in Southeast Asia's tropical rainforests? a. rice paddies b. teak trees c. coral reefs d. pearls

You would most likely find a young star in the Milky Way if you looked a. in the halo. b. in the nucleus. c. in a major spiral arm. d. between major spiral arms.

According to the International Astronomical Union, which of the following is one of the criteria for an object to classified as a Planet? Select all that apply.

What physical features are the five largest cities in the u. S. Near?

Because of his failed economic plan, Mao Zedong later opened China up to foreign trade. True False

Your friend tells you that our orbit is so special that it is at just the right distance from the sun for us to be at the right temperature for life to flourish. He says that if we were even ten miles closer to the sun, we would burn up.

The suns energy is classified by what