2. How did the rock of the Rocky Mountains form?
million years
What exactly happened?

What is the result of the greenhouse effect? a. heat is deflected from the atmosphere. b. heat is released from the atmosphere. c. heat is kept in the atmosphere. d. plants are able to grow in the tropics where the air is the heaviest.

Which statement best explains the difference between weather and climate

The ozone hole is at its biggest each year in the ? hemisphere in the ? season.