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| 14902323019 | abiotic factors | Nonliving components of environment. | 0 | |
| 14902323020 | biotic factors | All the living organisms that inhabit an environment | 1 | |
| 14902326391 | predator | An animal that hunts other animals for food | 2 | |
| 14902341863 | prey | An organism that is killed and eaten by another organism | 3 | |
| 14902397922 | Symbiosis | A close relationship between two species that benefits at least one of the species. | 4 | |
| 14902404371 | competition | the struggle between organisms to survive in a habitat with limited resources | 5 | |
| 14902423320 | Mutualism | A relationship between two species in which both species benefit | 6 | |
| 14902423322 | Commensalism | A relationship between two organisms in which one organism benefits and the other is unaffected | 7 | |
| 14902426924 | Parasitism | A relationship between two organisms of different species where one benefits and the other is harmed | 8 | |
| 14902435630 | resource partitioning | The division of environmental resources by coexisting species such that the niche of each species differs by one or more significant factors from the niches of all coexisting species | 9 | |
| 14902449514 | Forest Biome | A biome that includes all regions of forest over the lands of the Earth. | 10 | |
| 14902455532 | Desert Biome | a biome that has little or no plant life, long periods without rain, and extreme temperatures; usually found in hot climates | 11 | |
| 14902459271 | Grassland Biome | land biome characterized by moderate rainfall, fields of grasses, and few trees | 12 | |
| 14902463004 | tundra biome | extremely cold and dry biome; known for its permafrost, mosses, lichens, caribou, and snowy owl | 13 | |
| 14902474668 | Lake Biome | large bodies of freshwater surrounded by land | 14 | |
| 14902501666 | river biome | takes the water that collects in a watershed and ultimately deposits that water in the ocean | 15 | |
| 14902515481 | coral reef biome | occurs in the photic zone of warm tropical waters in scattered locations around the globe | 16 | |
| 14902520251 | mangrove swamps | A swamp that occurs along tropical and subtropical coasts, and contains salt-tolerant trees with roots submerged in water. | 17 | |
| 14902607973 | When the carbon in the ground is released into the air | Fossil fuel emissions | 18 | |
| 14902624263 | When the atmospheric carbon store get transferred into the oceanic carbon store | Carbon Diffusion | 19 | |
| 14902641764 | Photosynthesis | Plants use the sun's energy to convert water and carbon dioxide into sugars | 20 | |
| 14902652769 | When organisms die, they eventually become this carbon store | Fossil Fuels | 21 | |
| 14902666983 | The reservoir stage of the carbon cycle | Atmospheric carbon store | 22 | |
| 14902680777 | What are the two major reservoirs in the carbon cycle? | Atmospheric and Oceanic carbon stores | 23 | |
| 14902724805 | Nitrogen fixation | Process of converting nitrogen gas into ammonia | 24 | |
| 14902731401 | Nitrification | ammonia is converted to nitrate ions (NO3-). | 25 | |
| 14902735630 | Assimilation | Plants absorb nitrate and ammonia through their roots and use them for plant proteins and nucleic acids. Animals utilize nitrogen from plant tissues. | 26 | |
| 14902745214 | Denitrification | Conversion of nitrates into nitrogen gas | 27 | |
| 14902749567 | Decomposition | releases ammonium back into soil | 28 | |
| 14902795110 | Two Main Reservoirs for the Nitrogen Cycle | Sediments and rocks, atmosphere | 29 | |
| 14902836629 | Main Reservoir for Phosphorus | rocks and ocean sediments | 30 | |
| 14902842014 | Euthrophication | fertilizer gets into water and kills the plants which creates dead zones that have no life in them | 31 | |
| 14902851401 | DNA and RNA | 32 | ||
| 14902854933 | Decomposers | Releases phosphorus into soil | 33 | |
| 14902861852 | Phosphorus Cycle | The movement of phosphorus atoms from rocks through the biosphere and hydrosphere and back to rocks. | 34 | |
| 14902873543 | Evaporation | The change of a substance from a liquid to a gas | 35 | |
| 14902876450 | Condensation | The change of state from a gas to a liquid | 36 | |
| 14902879352 | Precipitation | Any form of water that falls from clouds and reaches Earth's surface. | 37 | |
| 14902884373 | Runoff | water that flows over the ground surface rather than soaking into the ground | 38 | |
| 14902890958 | Reservoir Stage in Water Cycle | Lakes, Oceans, Rivers, etc. | 39 | |
| 14903013563 | gross primary productivity | The total amount of solar energy that producers in an ecosystem capture via photosynthesis over a given amount of time | 40 | |
| 14903016852 | net primary productivity | the rate at which biomass accumulates in an ecosystem | 41 | |
| 14903020196 | Producers | Organisms that make their own food | 42 | |
| 14903020197 | Consumers | An organism that obtains energy and nutrients by feeding on other organisms or their remains. | 43 | |
| 14903032148 | What trophic level is a patch of dandelions in? | Producers | 44 | |
| 14903045624 | What trophic level would a rabbit be in? | 1st level consumer | 45 | |
| 14903053340 | Thermodynamics | study of the flow and transformation of energy in the universe | 46 | |
| 14903058329 | How much energy is lost at each trophic level? | 90% | 47 | |
| 14903062380 | positive feedback loop | feedback loop that causes a system to change further in the same direction | 48 | |
| 14903067171 | negative feedback loop | A feedback loop that causes a system to change in the opposite direction from which it is moving | 49 | |
| 14903084528 | What gives out the most nutrients? | Decomposers | 50 |
