What are the four main causes of erosion caused by humans?

What percentage of us water sources are considered to be polluted?

5x-4+21+90=180, what is it?

1. which of the following is not a primary reason for human migration? a. better job opportunities b. political unrest c. disastrous floods d. improving knowledge of other cultures 2. which of the following is not a characteristic of a country? a.

How many continents do we have?

Select the two factors that have the greatest influence on the state (solid or liquid) of each of Earth's layers. a. salinity b. density c. pressure d. temperature

What geographic feature is associated with an ocean plate going under a continental plate?

Elias is driving through the southwest part of the US on a road trip, and gets out of the car to go hiking. While hiking, he notes a very long channel running for miles in one direction.

How can something as massive as the Pacific Plate move?

Describe the difference between surface water and groundwater. (Own words)

1. According to the lecture, we are currently in an ice age and have been for the last 2.8 million years. a. True b. False 2. According to the lecture, we are within an interglacial period today. a. True b. False 3.