Across
- 4. an interacting group of various species in a shared/ common location.
- 7. a model that shows the flow of energy from one trophic, or feeding, level to the next in an ecosystem.
- 9. a complex network of interconnecting and overlapping food chains showing feeding relationships within a community.
- 10. convert (waste) into reusable material.
- 14. a community of living organisms (plants, animals and microbes) in a particular area.
- 15. a living thing, such as an animal, a plant, a bacterium, or a fungus.
- 16. life-like and is related to all the living entities present in an ecosystem.
- 18. the number of organisms that an ecosystem can sustainably support.
- 20. the community of plants and animals that occur naturally in an area, often sharing common characteristics specific to that area.
- 21. the region of the earth that encompasses all living organisms: plants, animals and bacteria.
- 22. the total amount of water on a planet.
- 23. organisms that make their own food; they are also known as autotrophs.
- 25. can exchange matter with its surroundings as well as absorb energy from its environment in the form of heat or light.
- 27. a chemical process that occurs in plants, algae, and some types of bacteria, when they are exposed to sunlight.
- 29. death; death rate.
- 31. animals that feed on plants, leaves, fruits & other plant-based food for nutrition.
- 32. a group of individuals of the same species living and interbreeding within a given area.
- 33. organism that breaks down dead organic material; also sometimes referred to as detritivores.
Down
- 1. the order in which species appear in an ecosystem over time.
- 2. the envelope of gases surrounding the earth or another planet.
- 3. non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.
- 5. the chemical element of atomic number 8 and the life-supporting component of the air.
- 6. an animal that feeds on other animals.
- 8. an organism that cannot produce its own food and must eat other plants and/or animals to get energy.
- 11. the rigid outer part of the earth, consisting of the crust and upper mantle.
- 12. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
- 13. a clear gas composed of one atom of carbon (C) and two atoms of oxygen (O).
- 17. the ratio of the number of births to the size of the population; birth rate.
- 19. a natural physical system that does not allow transfer of matter in or out of the system.
- 24. the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in cells).
- 26. an organism that eats plants and animals.
- 28. the effect that a pair of organisms living together in a community have on each other.
- 30. the chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about 78 percent of the earth's atmosphere.