Across
- 2. a three-step process in photosynthesis where plants use chemical energy from the light reactions to turn carbon dioxide into sugar
- 4. The chemical changes that take place in a cell or an organism
- 6. a pigment that gives plants their green
- 7. - an organelle within the cells of plants and certain algae that is the site of photosynthesis
- 9. dioxide is a gas that acts like a greenhouse when it enters the atmosphere
- 10. a clear liquid that cycles between clouds and the Earth's oceans and land
Down
- 1. the process of breathing in oxygen and breathing out carbon dioxide, and also the chemical process where living cells release energy from food
- 3. without oxygen
- 5. chemical process that occurs in plants algae and some types of bacteria when they are exposed to sunlight
- 8. a chemical element with an atomic number of 8