It increases in size

when core hydrogen

is used up.

The huge cracks in the earth and slumps that also happen are the result of what catastrophic event?

Between 1950 and 2000, the number of independent states A. remained the same B. increased slightly C. decreased slightly D. increased significantly E. decreased significantly

Geographic isolation is a problem that leads to more poverty because:

What do geographers call areas whose residents share a common characteristic? A. economic spheres B. free-trade zones C. homogeneous D. regions

Abrasion is caused by the effects of? temperature changes oxidation hydrolysis winds and sand

Dams are often built to generate power. One negative impact of damming a river is reduced flow downstream water storage to battle a drought increased recreation opportunities flood control

What three cities form the global centers of economic activity?

Describe and explain the physical and/or chemical methods used to refine the coal

Explain the characteristics of authoritarianism, and identify two Central Asian countries that have this type of government

Why are the rivers so vital to europe's economy?