Across
- 2. - The process by which green plants make their own food using sunlight.
- 5. - The process where a liquid changes into a gas.
- 8. - Rain, snow, sleet, or hail falling from the sky.
- 9. - The process where sediments, soil, and rocks are added to a landform.
Down
- 1. - A chemical reaction that produces heat and light, often called burning.
- 3. - The chemical breakdown of substances by bacteria, yeasts, or other microorganisms.
- 4. - The process where a gas changes into a liquid.
- 5. - The gradual wearing away of Earth's surface by wind, water, or ice.
- 6. - The process where a solid changes directly into a gas without becoming a liquid first.
- 7. - A chemical reaction where a substance combines with oxygen.