The Oxygen - Carbon Dioxide Cycle

Most living things on Earth must have oxygen to live. Oxygen is part of the air we breathe. About one fifth of our air is oxygen. Where does oxygen come from?

Plants make oxygen. Plants collect energy from the sun. They use it to make their own food, called sugar.

Plants need carbon dioxide. It is also part of the air. Plants use carbon dioxide to make their food. When they make food, they give off oxygen. To them, oxygen is a waste product. To us, oxygen is life!

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Fourth Grade
Worksheets

The Oxygen - Carbon Dioxide Cycle

Print The Oxygen - Carbon Dioxide Cycle reading comprehension.

Print a read and math workbook with The Oxygen - Carbon Dioxide Cycle reading comprehension.

You need to use this workbook in your classroom. Great mix of reading and math.

Fourth GradeWorksheets

The Oxygen - Carbon Dioxide Cycle

Print The Oxygen - Carbon Dioxide Cycle reading comprehension.

Print a read and math workbook with The Oxygen - Carbon Dioxide Cycle reading comprehension.

You need to use this workbook in your classroom. Great mix of reading and math.

Fourth Grade
Worksheets