US Geography - McGraw Hill 2024

Eutrophication occurs when too many dissolved nutrients enter bodies of water, encouraging the overgrowth of small plants, especially algae.

• True

• False

East of the Mississippi River lie the youngest mountains in North America, the Appalachians.

• True

• False

The state of Hawaii consists of one major island formed by a hotspot on the seafloor.

• True

• False

The Continental Divide in the Rockies separates the flow of water to the Pacific or to the eastern United States.

• True

• False

The Sierra Nevada are the oldest mountains in the United States.

• True

• False

The Hawaiian Islands were formed by volcanic eruptions on the seafloor.

• True

• False

The headwaters of the Colorado River and the Rio Grande are located in the Rocky Mountains where many tributaries merge to form these two major waterways.

• True

• False

The United States lacks significant deposits of fossil fuels.

• True

• False

Iron ore and coal are two important natural resources found in the Great Lakes region.

• True

• False

How did the Great Lakes form?

• by the collision of tectonic plates

• by runoff from the Appalachian Mountains

• by water rising from underground springs

• by glacier basins filling with water