In a series of rock layers, a geologist finds fossils of a pine trees and oak trees in layers that are 1.0 m and 1.5 m deep. however, in a layer that is 2.0 m deep, he finds fossils of tropical plants and trees.

which explains his findings?

a.
the ancient climate remained hot.

b.
the continent remained in the tropics.

c.
the continent shifted toward the mid-latitudes and polar regions.

d.
the continent shifted toward the tropics.

What does this grave marker reveal about roman society

What happens to rock when acid reacts with it?

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population