The subdivision of the geologic time scale that represents the longest time span is called a

Which of the following is a Mexican state? a. Gadsden b. Rio Grande c. Baja Arizona d. Baja California

Which phrases describe igneous rocks that cool quickly during formation? Check all that apply. -small crystals -coarse surfaces -formed from lava -found on Earth's surface -exposed after erosion occurs

Tornado ally is located where in the world?

What is a dangerous side-effect of hurricanes in the Central American region? volcanoes earthquakes pollution mudslides

Bills are proposed by

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?