| A | B |
|---|
| photosynthesis, | the process that converts energy in sunlight to chemical forms of energy that can be used by biological systems. |
| Autotrophs | self-feeding organisms, mainly green plants. They produce and consume their own food. |
| Heterotrophs | non self-feeding organisms. Ex: Since human beings rely on plants and animals as a food source, they are heterotrophs. |
| chlorophyll | gives the leaf its green color. This extraordinary chemical absorbs from sunlight the energy that is used in transforming carbon dioxide and water to carbohydrates, such as sugars and starch. |
| chloroplasts | T he organelle in a plant that contains chlorophyll and carries out photosynthesis |
| cellular respiration | The process that uses oxygen to create ATP for energy |
| mitochondria | organelle where cellular respiration occurs |
| photon | the smallest possible unit of light energy |
