Across
- 4. dioxide: a gas that is produced when people and animals breathe out that is used by plants for energy
- 5. the top layer of earth in which plants grow
- 8. to begin to grow
- 10. the green substance in plants that makes it possible for them to make food from carbon dioxide and water
- 11. to move pollen from one flower to another
- 12. a specialist in botany, which is a branch of science that deals with plant life
Down
- 1. a decayed mixture of plants (such as leaves and grass) that is used to improve the soil in a garden
- 2. the very fine usually yellow dust that is produced by a plant
- 3. an agent (such as an insect) that pollinates flowers
- 6. a substance that plants, animals, and people need to live and grow
- 7. a young plant that is grown from a seed
- 9. the process by which a green plant turns water and carbon dioxide into food when the plant is exposed to light