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| 7351083572 | 10% Rule | Everytime something's eaten only ten percent of the energy make it to the consumer. for example. a plant uses photosynthesis and would be able to use 10% of the energy, then a cow eats the plant and gets 10% of the plants energy, which is 1% of the original suns energy. next a person eats the cow and only gets .1% of the original energy from the sun. | 0 | |
| 7351087622 | Abiotic | Not associated with or derived from living organisms. Abiotic factors in nature are sunlight, temerature, wind, percipitation, etc. | 1 | |
| 7351088865 | Ammonification | Decomposing bacteria convert nitrogenous wastes and organic matter to ammonia (NH3) | 2 | |
| 7351096972 | Aquatic Life Zones | type 1- saltwater life zones (i.e. oceans and bays, estuaries, coastal wetlands, shorelines, coral reefs, and mangrove forests) type 2- freshwater zones (i.e. Lakes, rivers, streams and inland wetlands) | 3 | |
| 7351107626 | Assimilation | Plant roots absorb ammonium ions and nitrate ions for use in making molecules such as DNA, amino acids, and proteins. | 4 | |
| 7351117727 | Autotroph | a plant; producer; creates its own food from inorganic substances using light or chemical energy | 5 | |
| 7351123113 | Bioaccumulation | the build up of a substance (usually a toxin) as it passes through a food chain | 6 | |
| 7351130874 | Biogeochemical cycle | process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from living organisms to the abiotic environment such as soil or the atmosphere. | 7 | |
| 7351131667 | Biomagnification | The increase in the quantity and concentration of toxins and pollutants as you go up the food web | 8 | |
| 7351139001 | Biomes | regions of the world/ecosystems with similar climate and organisms; there are both terrestrial and aquatic) | 9 | |
| 7351140103 | Chaparral | A dense scrub land found in areas with Mediterranean climate(long warm , dry season and a cooler rainy season) | 10 | |
| 7351143970 | Chemotroph | an organism such as a bacterium or protozoan, that obtains its nourishment through the oxidation of inorganic chemical compounds, as opposed to photosynthesis. | 11 | |
| 7351155807 | Combusted | The process of burning | 12 | |
| 7351160779 | Coniferous Forest | a terrestrial biome found in temperate regions of the world with warm summers and cool winters | 13 | |
| 7351186765 | Conservation of Matter | Matter cannot be created or destroyed | 14 | |
| 7351187621 | Consumers | A heterotrophic organism that feeds on other organisms in a food chain | 15 | |
| 7351191403 | Deciduous Forest | vegetation composed primarily of broad-leaved trees that shed all their leaves during one season. | 16 | |
| 7351194361 | Decomposer | an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material. | 17 | |
| 7351196407 | Denitrification | the loss or removal of nitrogen or nitrogen compounds | 18 | |
| 7351208540 | Deserts | arid land with usually sparse vegetation; especially : such land having a very warm climate and receiving less than 25 centimeters | 19 | |
| 7351222314 | Detrivore | an animal that feeds on dead organic material, especially plant detritus. | 20 | |
| 7351223224 | Ecotone | a transitional area of vegetation between two different plant communities, such as forest and grassland. | 21 | |
| 7351225280 | Ecozone | A large geographical region having a distinct biodiversity of flora and fauna. | 22 | |
| 7351230091 | Energy Pyramid | a depiction of the amount of energy in each trophic level of an ecosystem | 23 | |
| 7351230545 | Eutrophication | the enrichment of an ecosystem with chemical nutrients, typically compounds containing nitrogen, phosphorus, or both. | 24 | |
| 7351232226 | Exchange pool | when chemicals are held for only short periods of time. Examples of exchange pools include plants and animals, which temporarily use elements in their systems and release them back into the air or surrounding medium. Exchange pools tend to be biotic factors while reservoirs tend to be abiotic factors. | 25 | |
| 7351234403 | Food Chain | shows how energy passes from one organism to another as food | 26 | |
| 7351340186 | Food Web | a graphical model depicting the many food chains linked together to show the feeding relationships of organisms in an ecosystem | 27 | |
| 7351340187 | Grasslands | Biome composed of large, rolling terrains of grasses, flowers, and herbs. A region where the average annual precipitation is great enough to support grasses, and in some areas a few trees. | 28 | |
| 7351340706 | Gross Primary Productivity | The rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances | 29 | |
| 7351340707 | Groundwater | water held underground in the soil or in pores and crevices in rock | 30 | |
| 7351341128 | Heterotroph | Organisms that cannot make their own food from inorganic chemicals and a source of energy and therefore live by feeding on other organisms | 31 | |
| 7351341356 | Law of the Minimum | Law stating that a population increases until the supply of the most limiting resource prevents it from increasing further | 32 | |
| 7351341357 | Law of Tolerance | the existence, amount, and distribution of species within an ecosystem depends on whether the levels of one or more physical or chemical factors are within the range tolerated by that species | 33 | |
| 7351341637 | Limiting Factor | Too much or too little of an abiotic or biotic factor can limit or prevent growth of a population | 34 | |
| 7351342006 | Net Primary Productivity | Rate at which all the plants in an ecosystem produce net useful chemical energy; equal to the difference between the rate at which the plants in an ecosystem produce useful chemical energy (gross primary productivity) and the rate at which they use some of that energy through cellular respiration. | 35 | |
| 7351342007 | Nitrification | the process by which ammonia is converted to nitrites (NO2-) and then nitrates (NO3-). This process naturally occurs in the environment, where it is carried out by specialized bacteria. | 36 | |
| 7351342741 | Nitrogen Fixation | Conversion of atmospheric nitrogen gas, by lightning, bacteria, and cyanobacteria, into forms useful to plants; it is part of the nitrogen cycle.Conversion of atmospheric nitrogen gas, by lightning, bacteria, and cyanobacteria, into forms useful to plants; it is part of the nitrogen cycle. | 37 | |
| 7351343705 | Phosphorus Cycle | A major biochemical cycle involving the movement of phosphorus throughout the biosphere and lithosphere. This cycle is important because phosphorus is an essential element for life and often is a limiting nutrient for plant growth. |  | 38 |
| 7351343706 | Photosynthesis | Synthesis of sugars from carbon dioxide and water by living organisms using light as energy. Oxygen is given off asa by-product. | 39 | |
| 7351344181 | Precipitation | Water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. | 40 | |
| 7351344419 | Primary | Any organism that consumes or feeds on autotrophs | 41 | |
| 7351344989 | Producer | an organism, either a green plant or bacterium, which is part of the first level of a food chain | 42 | |
| 7351349184 | Reservoir | Any person, animal, plant, soil or substance in which an infectious agent normally lives and multiplies. It typically harbors the infectious agent without injury to itself and serves as a source from which other individuals can be infected. | 43 | |
| 7351349185 | Residency Time | The amount of water in a reservoir divided by either the rate of addition of water to the reservoir or the rate of loss from it | 44 | |
| 7351349677 | Respiration | the metabolic processes whereby certain organisms obtain energy from organic molecules. It takes place in the cells and tissues during which energy is released and carbon dioxide is produced (aerobic and anaerobic) | 45 | |
| 7351352060 | Runoff | Downward surface movement back to the ocean to resume cycle (important part of the hydrolic cycle) | 46 | |
| 7351353999 | Secondary | Any organism that consumes or feeds largely on primary consumers, as well as autotrophs. | 47 | |
| 7351354279 | Sulfur Cycle | Cyclic movement of sulfur in various chemical forms from the environment to organisms and then back to the environment |  | 48 |
| 7351354280 | Terrestrial Cycle | Includes the processes of all ecosystems found in biomes. Six primary terrestrial ecosystems exist: tundra, taiga, temperate deciduous forest, tropical rain forest, grassland and desert. | 49 | |
| 7351354580 | Tertiary | A carnivore at the topmost level in a food chain that feeds on other carnivores; an animal that feeds only on secondary consumers. | 50 | |
| 7351354581 | Transpiration | Process in which water is absorbed by the root systems of plants, moves up through the plants, passes through pores (stomata) in their leaves or other parts, and evaporates into the atmosphere as water vapor. | 51 | |
| 7351354888 | Trophic Level | All organisms that are the same number of energy transfers away from the original source of energy (for example, sunlight) that enters an ecosystem. For example, all producers belong to the first trophic level and all herbivores belong to the second trophic level in a food chain or a food web. | 52 | |
| 7351354889 | Tropical Rainforest | most diverse and hottest terrestrial biome, biome near the equator with warm climate wet weather and lush plant growth | 53 | |
| 7351375245 | Tundra | treeless plains that are the coldest of all the biomes; occur in the arctic and Antarctica. Dominated by lichens, mosses, sedges, and dwarfed shrubs Characterized by extremely cold climate, permanently frozen ground (permafrost) low biotic diversity, simple vegetation structure, limitation of drainage, short season of growth and reproduction. | 54 |
