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UNIT 2 pt. 1
Spheres of the Earth
| Term | Definition |
|---|---|
| Lithosphere/Geosphere | Stone/ground sphere of the earth; made of rocks, minerals, and soil; also includes the earth's interior |
| Hydrosphere | Water sphere of the earth; contains all of the water that is on Earth's surface, underground, and in the air |
| Cryosphere | The frozen part of the hydrosphere; made primarily of glaciers and sea ice |
| Atmosphere | The air sphere of the earth; made of the gases surrounding the earth; mostly nitrogen and oxygen |
| Biosphere | The sphere of earth containing life; extends high into the air and below the surface into oceans |
| Ecology | The scientific study of interactions between organisms and their environments |
| Biotic Factors | Living organisms that inhabit an environment |
| Abiotic Factors | Nonliving parts of an environment |
| Individual/Organism | One individual thing, one way to be organized |
| Population | Group of organisms of one species in one place at the same time |
| Community | Interacting populations; many species together in one place |
| Ecosystem | All biotic and abiotic factors in a certain area |
| Biome | All the ecosystems in a portion of the world with a specific climate |
| Biosphere | The portion of the earth where life is found |
| Niche | The unique role a species plays in the environment |
| Habitat | Where an organism lives (can be shared with other species) |
| Fundamental Niche | The role an organism can occupy without competition |
| Realized Niche | The smaller niche an organism occupies because of competition |
| Tolerance | The ability of an organism to survive in changing conditions, such as temperature |
| Specialists | Organisms that have limited tolerance and can only withstand small changes in their environments |
| Generalists | Organisms that adapt easily to changes in their niche due to large ranges of tolerance |
| Autotrophs/Producers | Obtain energy from the sun or chemical compounds |
| Heterotrophs/Consumers | Depend on autotrophs for energy; herbivores eat plants, carnivores eat meat, omnivores eat both plants and meat |
| Scavengers | Eat animals that have already died |
| Decomposers | Break down dead and decaying matter into simpler molecules that can be absorbed |
| Food Chains | Show the feeding relationships of organisms with arrows that show the transfer of energy |