What are the effects of chemicals like gasoline, pesticides, and fertilizers on a river? Select two answers.

The dam shown in the image is holding back water and sediment from a river. What is the primary purpose of this dam?

What is one way that a dam can impact the environment?

What happens to sediments when a dam is built on a river?

Which of the following is NOT an effect of chemicals entering a river?

Which of the following is a direct effect of gasoline entering a river?

How does the composition of the river change downstream from the dam? Select two answers.

The dead zone in the Gulf of Mexico is located off the coast of which states?

What is the primary human activity contributing to the dead zone in the Gulf of Mexico?

The fertilizers that cause the dead zone are primarily used in ____________. A) construction B) agriculture C) fishing D) mining

What happens to marine life in the dead zone?

Which body of water is affected by the dead zone?

The dead zone is near where the ____________ River empties into the ocean.

Which term describes the process of fertilizers entering water bodies?

A region of land where all the water drains into a single river, lake, or other body of water.

Water found on the surface of the Earth, such as in rivers, lakes, and ponds.

A large, slow-moving mass of ice that forms in cold areas over many years.

Small pieces of soil and rock that are carried by water and can build up in rivers and lakes.

Water that is stored underground in spaces between rocks and soil.

Non-renewable energy sources like coal, oil, and natural gas that release pollution when burned.

Water that flows over land and carries soil, chemicals, or other materials into rivers and lakes.

To catch or trap something in a way that it cannot move freely.

Small pieces of plastic that pollute water and harm animals when they are eaten.

A structure built near dams to help fish swim upstream to reproduce.

An area in water with very little oxygen, where most animals and plants cannot survive.

Catching too many fish so that there are not enough left to reproduce and keep the population healthy.

The addition of harmful substances to the environment.

A substance added to soil to help plants grow, but it can harm water if it runs off into rivers.

Poisonous or harmful to living things.

Energy from natural sources like sunlight, wind, and water that can be used without running out.