Front

What is the role of the sun in the water cycle?

Back

The sun provides heat energy for evaporation.

Front

What can trees do because they are in sunlight?

Back

Trees can take in carbon from the air. The carbon is used to make energy storage molecules.

Front

What happens to the total amount of carbon in a closed ecosystem?

Back

The total amount of carbon does not change because carbon can not be produced or used up.

Front

Why can't plants use nitrogen gas directly from the atmosphere?

Back

The nitrogen atoms are held together by a stable triple bond.

Front

What is the relationship between groundwater and aquifers?

Back

Groundwater is stored in aquifers.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What is energy?

Back

Energy is the ability to do work or cause change.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms and their interactions with the environment.

Front

What is the water cycle?

Back

The water cycle is the continuous movement of water through evaporation, condensation, and precipitation.