Across
- 1. cycle The process by which carbon moves within and between organisms and their physical environment.
- 3. The process by which molecules at the surface of liquid absorb enough energy to change to a gas.
- 5. Any form of water that falls from clouds and reaches Earth's surface as rain, snow, sleet, or hail.
- 6. fixation The process of changing free nitrogen gas into nitrogen compounds that plants can absorb and use.
- 7. The change in state from a gas to a liquid.
- 9. An organism that cannot produce its own food.
Down
- 1. respiration The process in which oxygen and glucose undergo a complex series of chemical reactions inside cells, releasing energy.
- 2. The process by which cells release energy by breaking down food molecules without using oxygen.
- 4. An organism that is able to capture energy from sunlight or chemicals and use it to produce its own food.
- 5. The process by which plants and other autotrophs capture and use light energy to make food from carbon dioxide and water.
- 7. A green photosynthetic pigment found in the chloroplasts of plants algae and some bacteria.
- 8. The community of organisms that live in a particular area, along with their nonliving environment.