Across
- 4. a layer of gas and suspended solids extending from the Earth's surface up many thousands of miles.
- 6. web consists of all the food chains in a single ecosystem
- 9. a colorless tasteless odorless element that occurs as a gas which makes up 78 percent of the atmosphere and that forms a part of all living tissues.
- 10. an organism that eats plants and animals.
- 13. a community of living organisms (plants, animals and microbes) in a particular area.
- 18. a nonliving part of an ecosystem that shapes its environment.
- 19. an organism, often a bacterium, fungus, or invertebrate that feeds on and breaks down dead plant or animal matter, making organic nutrients available to the ecosystem.
- 21. the rigid, outermost layer of the Earth's rocks and minerals, which consists of the crust and upper mantle.
- 24. pyramid a model that shows the flow of energy from one trophic, or feeding, level to the next in an ecosystem.
- 26. dioxide a clear gas composed of one atom of carbon (C) and two atoms of oxygen (O).
- 28. a directional, predictable change in community structure over time
- 29. the ratio of the number of births to the size of that population.
- 31. the sum of Earth's water, in the ocean, the ground, on the surface, and in the air.
- 32. the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.
- 33. the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
Down
- 1. the state of being mortal (destined to die).
- 2. system a system that is completely isolated from its environment.
- 3. A chemical process that occurs in plants, algae, and some types of bacteria, when they are exposed to sunlight.
- 5. a large naturally occurring community of flora and fauna occupying a major habitat, could be a forest or tundra.
- 7. the process by which organisms exchange gases, especially oxygen and carbon dioxide, with the environment.
- 8. an organism that creates its own food or energy.
- 11. an organism that mostly feeds on plants.
- 12. an interacting group of various species in a shared/ common location.
- 14. capacity the number of organisms that an ecosystem can sustainably support.
- 15. a group of individuals of the same species living and interbreeding within a given area.
- 16. an organism that cannot produce its own food and must eat other plants and/or animals to get energy.
- 17. any living thing.
- 20. a reactive element that is found in water, rocks, and free as a colorless tasteless odorless gas which forms about 21 percent of the atmosphere.
- 22. system a system that has flows of information, energy, and/or matter between the system and its environment, and which adapts to the exchange
- 23. the study of the relationships between living organisms, including humans, and their physical environment.
- 25. Consisting of living organisms.
- 27. an organism that eats meat, or the flesh of other animals.
- 30. convert (waste) into reusable material.