Across
- 4. carbon dioxide and glucose make up this cycle
- 7. thin outermost zone of the earth
- 8. community of organisms and their abiotic environment
- 9. part of crust and upper part of mantle
- 14. sequence in which organisms consume others
- 16. make their own food
- 17. system where energy but not matter is exchanged with surroundings
- 18. earth's actual shape
- 19. system in which matter and energy are exchanged with surroundings
- 20. center of earth, made of iron and nickel
- 21. related objects that interact to create a whole
Down
- 1. force of attraction between all objects
- 2. break down dead organisms
- 3. enters the soil and water when rock breaks down in this cycle
- 5. layer of earth that makes up 2/3 of earth's mass
- 6. layer of earth that flows under pressure
- 7. largest population an environment can support
- 10. relationship between food chains
- 11. group of processes where matter moves through reservoirs
- 12. get energy from eating other organisms
- 13. condensation, precipitation, and evaporation make up this cycle
- 15. makes up 78% of atmosphere