What substance in the upper atmosphere blocks ultraviolet radiation from the sun, making life on land possible?

a. methane

b. ozone

c. water vapor

d. carbon dioxide

The Cascade Mountains run north and south through the middle of both Washington and Oregon. The west side of these mountains (seaward facing) receives an abundance of rain while the east side (inland facing) is remarkably dry.

High government expenditures can lead to a bigger a. revenue. b. stimulus. c. deficit. d. surplus.

AI 4) How does an increase in sea floor spreading rate (u) influence: a. The steepness of walls at Mid-ocean ridges? b.

What percentage of Africa has inadequate precipitation

A blank is a large mass of moving ice

Most rivers have relatively gentle gradients in the headwaters and steep gradients in their downstream portions. True / False.

In which world region do hurricanes form? A. along the Equator B. near the poles C. only in the Atlantic Ocean D. only in the Pacific Ocean

What is the diameter of the geosphere

A major concern about increasing global temperatures is that a large portion of polar ice could detach and melt into the ocean.

Match the vocabulary word with its description. 1. produced from the sun biomass energy 2. produced by burning organic materials geothermal energy 3. produced from the heat inside the earth hydroelectric power 4.