What conditions prevent trees from growing in the tundra?

Which gas forms 21 percent of earths atmosphere?

Between 1978 and 2004, the number of people living in cities in China grew from 170 million to 540 million. What is the most likely reason for this growth? A. People moved because there are better educational opportunities in the city B.

11. What causes the steep slopes of stratovolcanoes (composite cones) ? a. large volumes of pahoehoe lava b. large volumes of a'a' lava c. large volumes of cold tephra (pyroclastic particles) d. large volumes of hot tephra that weld to one another

The colonies were able to communicate with each other through the Intolerable Acts. True False

What is the poverty rate in greenland 2020

In your own words, describe how a primary wave moves.

Based on studies of planetary systems around other stars, which of the following statements are currently believed to be true about how common or rare it is for stars to have planets in orbit around them?

The less mass in a given volume of air, the a. more the air weighs. b. greater the air pressure. c. more dense the air. d. less dense the air.

Which is the most destructive kind of mass movement

What immediately happens to rainwater when it falls to earth? What eventually happens to it?