Which modern day country was a culture hearth?
A. Russia
B. India
C. Canada
D. Iraq

Drag the tiles to the correct boxes to complete the pairs. match the stages to their features. low birth rates, death rates are constant high birth rate, and death rate high birth rate and low death rate pre-modern mature industrial industrialization

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.