Caves are formed from:

freezing water

sedimentation

mechanical weathering

chemical weathering

How do you think pollutants are removed from the atmosphere? does this occur quickly or slowly?

Why do most people live in the eastern part of the United States

Where are most of the cities in colombia located

What percentage of garbage can be burned as fuel? 66 percent 50 percent 10 percent 100 percent

What does it mean to measure A migration right? How do you migration rates affect populations? Explain your answer in at least two or three sentences.

How the moon was formed

Which of the following kinds of environmental problems is irreversible? A. Water pollution B. Extremely high atmospheric carbon dioxide levels C. Polar ice pack melting D. Species extinction

How can we calculate the mean temperature of a particular place?

What conditions make for a violent volcanic reuption?

Why is the Amazon River called the Ocean River?