| A | B |
|---|
| organisms | living things |
| chlorophyll | a green substance in plant leaves that captures energy from the sun |
| carbon dioxide | a gas in the atmosphere that plants use during the process of photosynthesis |
| stomata | tiny holes in the leaves of a plant that allow gases to enter or leave the plant |
| photosynthesis | the process in which plants use energy from the sun to make their own food |
| carbon dioxide-oxygen cycle | the movement of carbon dioxide and oxygen between organisms and the air |
| roots | plant parts that hold a plant in place and take in water and nutrients |
| stem | a plant part that holds leaves up and moves water and nutrients throughout the plant |
| leaf | a plant part that carries out photosynthesis to make food for the plant |
| carbon cycle | the movement of carbon on Earth by the processes of respiration and photosynthesis |
| oxygen | a gas produced by plants during photosynthesis that animals use for respiration |
| respiration | a process by which animals use oxygen and food to make energy and carbon dioxide |
| bubble | gas or air in a liquid |
| elodea | an aquatic plant |
