How do scientists determine when an era begins and when it ends?

1. How do you think the location of a volcano affects the magma composition? 2. Which magma composition causes the most violent volcanic eruptions? Why? 3. Describe how magma composition and the resulting eruption affect the form of a volcano.

Identify one change that would cause increase in rate of stream erosion in the river valley in the mountains

How does a topographic map show the elevation of the land?

Which of the following statements best describes the primary effect of globalization? A. Globalization reduces unique features of local culture and contributes to global cultural homogenization. B.

Which of the following is a moon of Jupiter? a) Ganymede b) Titan c) Pan d) Phobos

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?