7. the cause of the most recent mass extinction identified in earth’s history is a) a meteorite impact b) large scale volcanism c) major change in ocean circulation d) continental glaciation e) human activities

How much water is in the ocean in cubic kilometers

What are canada’s major boundaries?

In the von thunen model of agricultural land use, what is produced closest to the city epicenter? a. dairy, vegetables, and fruits b. field crops, such as corn and wheat c. beef and other animal products d. wood and lumber