Human Impact Review

This is a process in which materials with carbon, such as fossil fuels and trees, are burned, producing carbon dioxide gas.

The process in plants that uses solar energy, water and carbon dioxide gas to produce oxygen gas and carbohydrates is called _____________________.

When animals and plants die, the bacteria that decompose them change the carbon in the dead animals and plants to carbon dioxide gas and soil carbon. This is called _________________.

When animals breathe, they produce carbon dioxide gas. This is called ________________.

Carbon can be present in the atmosphere as ____________________.

Water that moves on the surface of the Earth and into rivers, lakes and oceans is called ______________________. This can also move contamination from the land into rivers, lakes and oceans.

Water that exists under the ground is called _________________. Many people use this water for drinking.

The process in which liquid water changes to water vapor and moves to the atmosphere.

The process in which liquid water in clouds falls to Earth as rain or snow.

The process in which water moves on the Earth into rivers, lakes and oceans, and also into the ground.

The process in which water vapor changes to liquid water and makes clouds.