1. what is the most abundant gas in the atmosphere?

nitrogen

2. The form of oxygen that combines three oxygen atoms into each molecule is called? ozone

3. most important weather phenomena occur in the?

troposphere

100% correct.

about 140,000 japanese died in this japanese city when americans dropped an atomic bob at the end of world war II

An astronomer's work should explain past astronomical observations as well as a. verify hypotheses. b. predict future observations. c. describe the past. d. perform calculus upon observations.

Where is Machu Picchu located? A. Brazil B. Chile C. Venezuela D. Peru

How does the banding pattern of rocks and the dating of these rocks give evidence of sea floor spreading?

4. What is a factory farm, and why have people criticized them?

Why do the North and South pole experience seasons differently than the rest of the planet? Why do they have periods of continuous daylight or continuous darkness?

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.