Across
- 2. When organisms fight for the same resources
- 4. From the time before written records
- 5. An animal that hunts other animals
- 7. A sudden increase in disease cases
- 9. An animal hunted by another animal
- 10. A plant grown for food or other use
- 12. The total amount of living matter in an area
- 16. A group of the same species living in one area
- 18. A gas used by plants during photosynthesis
- 19. A community of organisms and their environment
- 21. The process cells use to release energy from food
- 22. The largest population an environment can support
- 26. Conditions that restrict population growth
- 29. Native to a certain area
- 30. A simple sugar used for energy
- 31. A series showing how energy moves through organisms
- 32. An organism that eats other organisms
Down
- 1. A network of connected food chains
- 3. The process plants use to make food from sunlight
- 5. A substance formed during a chemical reaction
- 6. A rapid spread of disease in a population
- 8. The shift from hunting and gathering to farming
- 11. A living thing
- 13. The molecule that stores and transfers energy in cells
- 14. Equilibrium A balance in nature that changes over time
- 15. To break down food into simpler substances
- 17. The breakdown of dead organisms
- 20. Choosing organisms with desired traits to reproduce
- 23. A starting substance in a chemical reaction
- 24. An organism that makes its own food
- 25. Cell structures where energy is produced
- 27. To take in or soak up a substance
- 28. The practice of farming and growing crops