Across
- 4. the study of how living things interact with their environment
- 5. an organism that can make its own food- an autotroph
- 6. this cycle involves animals’ cells releasing this gas after they go through cellular respiration to change food (glucose) to energy
- 7. an organism’s particular role in an ecosystem
- 8. this cycle involves plants taking in this element along with others to change it to glucose
- 9. the factors that are nonliving in an environment
- 14. the largest population an environment can support is called this (2 words)
- 15. the part of an ecosystem where an organism lives and feeds is called the organism’s ___
- 18. all the different populations living together make this
- 19. organisms that break down material in dead organisms to release some of the nutrients back into the environment
- 21. carbon dioxide is being released into the atmosphere a lot due to humans burning ___ ___ which give of harmful greenhouse gases
- 22. Shows the amount of energy that moves from one level to the next.
- 24. organisms that leave an area in search of better resources is this
- 25. water changing from a gas to a liquid in the water cycle
- 26. A series of events in which an organism eats another and obtains energy
- 27. this cycle involves bacteria that change this element into a usable form for plants to take it up from the soil
- 30. energy cannot be created or destroyed, can only transfer or change form
- 31. something that prevents an organism from living or growing in an environment (2 words)
- 32. the number of organisms per unit area (2 words)
Down
- 1. water changing from a liquid to a gas in the water cycle
- 2. matter cannot be created or destroyed- only changes form
- 3. many ecosystems together make this
- 8. an organism that must take in food for energy- it cannot make its own, a heterotroph
- 10. the smallest unit of ecological organization is a single ___
- 11. process of water falling to earth in the water cycle
- 12. the community of organisms plus the nonliving factors make up this
- 13. A model that shows how matter and energy are transferred in different ways among many organisms
- 16. Populations can increase when ___ rate is higher than ___ rate (2 words)
- 17. organisms that enter a new area and increase the population size
- 20. the living and once living factors in an ecosystem
- 23. all the members of one species living in a particular area
- 28. the struggle between organism to survive in a habitat with limited resources
- 29. the process of water going from the atmosphere to earth and back