| 1813651563 | Biome | A large region characterized by a specific type of climate and certain types of plant and animal communities. |  | 0 |
| 1813651564 | Savanna | A tropical / subtropical grassland biome with scattered individual trees, large herbivores, and three distinct seasons based primarily on rainfall, maintained by occasional fires and drought. |  | 1 |
| 1813651565 | Desert | A region of little vegetation, either cold or hot, that receives ten inches or less of precipitation each year, long periods without rain, deserts have extreme temperatures. |  | 2 |
| 1813651566 | Tundra | Biome that surrounds the north and south poles; treeless landscape with short, cool summers, and long, very cold winters with short periods of winter sunlight, beneath the topsoil is a layer of permafrost. |  | 3 |
| 1813651567 | Temperate Deciduous Forest | Characterized by warm summers, cool winters, has all four seasons, year-round precipitation and fertile soil. |  | 4 |
| 1813651568 | Conifer | Cone-bearing trees (ie: pine, or fir tree) of middle and high latitudes that are mostly evergreen and that have needle-shaped or scale like leaves. Conifers are able to withstand the long, cold winter season. |  | 5 |
| 1813651569 | Coniferous Forest | Forest populated by cone-bearing evergreen trees; mostly found in the colder northern latitudes. |  | 6 |
| 1813654489 | Flora | All the plant life in a particular region, or period. |  | 7 |
| 1813835407 | Fauna | All of the animal life in a particular region, or period. |  | 8 |
| 1813835408 | Steppe | A climate with partly dry grassland often found on the edges of a desert. It receives less than 20 inches of rain per year. |  | 9 |
| 1813835409 | Pampas | Flat grassland regions in the southern part of South America: A region similar to the Great Plains in the United States. |  | 10 |
| 1813835410 | Prarie | A large area of flat land, or rolling hills covered by grasses and wild flowers but few trees. |  | 11 |
| 1813835411 | Temperate | Climate zones with moderate (warm) temperatures that are located between the tropics and the polar zones. |  | 12 |
| 1813835412 | Permafrost | A layer of permanently frozen subsoil found in the tundra |  | 13 |
| 1813835413 | Alpine Tundra | biome at high mountain altitudes, which has vegetation & climate similar to those of the Arctic tundra
(though no permafrost) |  | 14 |
| 1813835414 | Marine | Biome that includes open ocean, seashore, and it covers 75% of the planet. There is a very high salinity level, and a wide variety of animals |  | 15 |
| 1813835415 | Plankton | A general term for the tiny, free-floating or weakly swimming organisms that live in both freshwater and saltwater environments. |  | 16 |
| 1813835416 | Estuary | An area where fresh water from a river mixes with salt water from an ocean; are productive ecosystems because they constantly recieve fresh nutrients from the river and the ocean. |  | 17 |
| 1813835417 | Forest | Large tree and plant filled area that covers 30% of Earth's land surface. Provide habitats, maintain soil, air, and water quality, acts as a carbon sink in biogeochemical cycle. |  | 18 |
| 1813835418 | Intertidal Zone | Part of the shoreline that is under water at high tide and exposed to the air at low tide. |  | 19 |
| 1813835419 | Neritic Zone | Area of ocean that extends from the low-tide line out to the edge of the continental shelf. |  | 20 |
| 1813835420 | Benthic Zone | At the bottom of all aquatic biomes, deep or shallow. Made up of sand and organic and inorganic sediments. | | 21 |
| 1813835421 | Oceanic Zone | All the water the covers the sea floor except for the continental shelf -water temperature is colder and pressure is greater -strange looking animals live in the dark deeper areas. (Ex. Giant Squid). | | 22 |
| 1813835422 | Coral Reef | A structure of calcite skeletons built up by coral animals in warm, shallow ocean water. |  | 23 |
| 1813835424 | Open Water Zone | The zone of a lake or pond that extends from the littoral zone out across the top of the water, and that is only as deep as light can reach through the water. |  | 24 |
| 1813835425 | Deep Water Zone | The zone of a lake or pond below the open water zone where no light reaches. | | 25 |
| 1813835426 | Wetland | An ecosystem in which water either covers the soil or is present at or near the surface of the soil for at least part of the year. |  | 26 |
| 1813835427 | Marsh | A type of wetland featuring grasses, reeds and other plants in shallow water. |  | 27 |
| 1813835428 | Tributary | A stream or river that flows into a larger river. |  | 28 |
| 1813835429 | Freshwater | Aquatic ecosytem that does not contain any saltwater, can be rivers, lakes, streams,ponds, and wetlands. |  | 29 |
| 1816896349 | Littoral Zone | Shallow water near shore that receives enough sunlight to support photosynthesis. May be marine or freshwater; often flowering plants are present. |  | 30 |
| 1866499551 | Brackish Water | More salty than fresh water, and less salty than marine saltwater. It is found in estuaries where freshwater and saltwater mix. |  | 31 |
| 2826384966 | Biosphere | Consists of all life on Earth and all parts of the Earth in which life exists, including land, water, and the atmosphere. |  | 32 |
| 2826389292 | Organism | Individual living thing. |  | 33 |
| 2826394407 | Species | A group of organisms that are closely related, who can mate to produce fertile offspring. All of the cats are feline, but each cat is a different species. |  | 34 |
| 2826414247 | Biodiversity | The number, and variety of living organisms in a given area, during a specific period of time. |  | 35 |
| 2826481213 | Ecosystem | A system formed by the interaction of a community of organisms with their physical environment. |  | 36 |
| 2826483337 | Habitat | Place where an organism lives. |  | 37 |
| 2826486753 | Niche | An organism's particular role in an ecosystem, or how it makes its living. |  | 38 |
| 2826491414 | Abiotic | All of the non-living parts of an ecosystem. |  | 39 |
| 2826494640 | Biotic | All of the living parts of an ecosystem. |  | 40 |
| 2826498070 | Biomass | Total amount of living tissue within a given trophic level. |  | 41 |
| 2826520334 | Herbivore | A consumer that eats only plants. |  | 42 |
| 2826523311 | Carnivore | An animal that eats other animals
A consumer that eats only animals. |  | 43 |
| 2826746116 | Omnivore | A consumer that eats both plants and animals. |  | 44 |
| 2827204867 | Producer | An organism that can make its own food. |  | 45 |
| 2827208519 | Consumer | An organism that obtains energy by feeding on other organisms. |  | 46 |
| 2827211015 | Autotroph | An organism that makes its own food. |  | 47 |
| 2827212389 | Heterotroph | An organism that cannot make its own food, it gets food by consuming other living things, or their by-products. |  | 48 |
| 2827221759 | Taiga | A biome in which the winters are cold, but summers are mild enough to allow the ground to thaw, it contains mostly coniferous forests. |  | 49 |
| 2827232046 | Prey | An organism that is hunted, killed and eaten by another organism. |  | 50 |
| 2827239971 | Predator | An animal that hunts, and kills other animals for food. |  | 51 |
| 2836335337 | Population | A group of individuals that belong to the same species and live in the same area. |  | 52 |
| 2836342352 | Community | A group of interdependent organisms inhabiting the same region and interacting with each other. |  | 53 |
| 3017804250 | Food Web | A diagram that shows the feeding relationships between organisms in an ecosystem; it contains multiple overlapping food chains. |  | 54 |
| 3017808623 | Food Chain | A diagram that represents how energy in food flows from one organism to the next in an ecosystem. |  | 55 |
| 3032357054 | Energy Pyramid | A diagram that shows the amount of energy that moves from one trophic level to another in an ecosystem. |  | 56 |
| 3032364500 | Limiting Factor | A biotic or abiotic factor that restricts the number, distribution, or reproduction of a population within a community. |  | 57 |
| 3032566774 | Carrying Capacity | Largest number of individuals of a population that a environment can support. |  | 58 |
| 3032570504 | Predation | An interaction in which one organism captures and feeds on another organism to gain energy. |  | 59 |
| 3032580765 | Competition | Ecological relationship in which organisms compete for available resources. There are 2 types: between organisms within a population, and between different populations. |  | 60 |
| 3032637055 | Symbiosis | A close relationship between two species that benefits at least one of the species. |  | 61 |
| 3032646260 | Mutualism | A relationship between two species in which both species benefit. |  | 62 |
| 3032654915 | Parasitism | A relationship between two organisms of different species where one benefits and the other is harmed. |  | 63 |
| 3032663260 | Commensalism | A relationship between two organisms in which one organism benefits and the other is unaffected. |  | 64 |
| 3032700593 | Co-evolution | Relationship in which 2 organisms change or adapt together over time. |  | 65 |
| 3032712740 | Cooperation | Relationship in which behavior by two or more individuals leads to mutual benefit. |  | 66 |
| 3043481046 | Decomposition | The breaking down of matter into simpler molecules. Typically performed by bacteria. |  | 67 |
| 3043515943 | Carbon Cycle | The movement of carbon from the nonliving environment into living things and back. |  | 68 |
| 3043534129 | Combustion | Burning of fossil fuels and wood, releasing energy and carbon dioxide. |  | 69 |
| 3043570403 | Nitrogen Cycle | The movement of nitrogen from the atmosphere to the soil, to living organisms, and back to the atmosphere. |  | 70 |
| 3043629157 | Water Cycle | The movement of water from Earth's surface to the atmosphere and back. |  | 71 |
| 3043862963 | Photosynthesis | Process used by plants to capture and convert the sun's energy, water, and carbon dioxide into glucose (sugar). |  | 72 |
| 3043878716 | Transpiration | The evaporation of water from the leaves of a plant into the atmosphere. |  | 73 |
| 3043889047 | Succession | The sequence of biotic changes that regenerate a damaged community or create a community in a previously uninhabited area. |  | 74 |
| 3043904667 | Primary Succession | Biotic growth on newly exposed areas (bare,rocky) that were not previously occupied by soil and vegetation. |  | 75 |
| 3043909505 | Secondary Succession | A type of ecological succession that occurs where a disturbance has destroyed an existing biological community but left the soil intact. |  | 76 |
| 3043919508 | Pioneer Species | Creates soil in primary succession (lichen/moss) first species to appear on bare or rocky area. |  | 77 |
| 3043944042 | Nitrogen Fixation | Process in which bacteria in the soil change nitrogen gas into materials that plants can use during photosynthesis. |  | 78 |
| 3043960003 | Evaporation | A physical change from a liquid to a gas at a temperature that is lower than the boiling point. |  | 79 |
| 3043960004 | Condensation | A physical change from a gas to a liquid at cooler temperatures (the opposite of evaporation). |  | 80 |
| 3043961444 | Precipitation | Any form of water that falls from clouds and reaches Earth's surface. |  | 81 |
| 3043961445 | Nitrification | The process by which nitrites and nitrates are produced by bacteria in the soil. |  | 82 |
| 3043963626 | Denitrification | Denitrifying bacteria converts nitrates into gaseous nitrogen that re-enters the atmosphere. |  | 83 |
| 3044075276 | Respiration | The exchange of oxygen and carbon dioxide between living cells and their environment; this includes breathing and cellular respiration. |  | 84 |
| 3044100431 | Aquifer | An underground area of sediment and rocks that is filled with groundwater. |  | 85 |
| 3044102957 | Pollution | An unwanted change in the environment caused by the introduction of harmful materials, or the production of harmful conditions (chemical, biological, heat, cold, sound). |  | 86 |
| 3045432169 | Renewable Resource | A natural resource that can be replaced at the same rate at which the resource is consumed. |  | 87 |
| 3045434921 | Non-Renewable Resources | A resource that cannot be reused or replaced as quickly as it is used (ex. gems, iron, copper, fossil fuels). |  | 88 |
| 3045437916 | Overpopulation | Term used when the number of people in an area exceeds the capacity of the environment to support life at a decent standard of living. |  | 89 |
| 3045439480 | Conservation | The preservation, wise use, and protection of natural resources. |  | 90 |
| 3045441946 | Recycle | The process of recovering valuable or useful materials from waste or scrap; the process of reusing, or remanufacturing some items. |  | 91 |
| 3054631168 | Percolation | The downward movement of water through soil and rock due to gravity. |  | 92 |
| 3054631169 | Infilration | Process of water seepage into the ground becoming ground water. |  | 93 |
| 3054636518 | Runoff | Part of the water cycle where an excess of water runs down and does not sink into the soil and eventually makes it to the rivers, lakes, and oceans. |  | 94 |
| 3267132372 | Biodegradable | Capable of being broken down by bacteria and other decomposers. |  | 95 |
| 3272938190 | Reduce | To cut down / back on the consumption of; or to use less of a resource. |  | 96 |
| 3272938887 | Reuse | Involves using a resource over and over in the same form. |  | 97 |
| 3274812180 | Deciduous | Falling off or shed at a particular season, stage of growth, etc., as leaves, horns, or teeth; not permanent; transitory. |  | 98 |
| 3274877276 | Polar | A cold air mass that forms north of 50° north latitude or south of 50° south latitude and has high air pressure |  | 99 |
| 3274877277 | Frigid | Intensely cold temperatures; cold in manner; Ex. frigid zone |  | 100 |
| 3274878478 | Tropical | Biome near the equator with warm temperatures, wet weather, and lush plant growth. |  | 101 |
| 3274878479 | Climate | Seasonal pattern of weather conditions in a large geographic area over many years; it does not change rapidly. |  | 102 |
| 3274881569 | Climate Zone | A region in which yearly patterns of temperature, rainfall, and the amount of sunlight are similar throughout. |  | 103 |
| 3306675658 | Grassland | A biome found in the dry temperate interiors of continents. This biome is characterized by rich soil, moderate rainfall, a hot, dry climate, thick grasses, and herds of grazing animals. |  | 104 |
| 3306692767 | Canopy | Dense covering formed by the leafy tops of tall rainforest trees. |  | 105 |
| 3306692863 | Tropical Rain Forest | Biome characterized by hot temperatures, large amounts of rainfall, and high biodiversity,that grows near the equator; it receives large amounts of rain, and has dense growths of tall, leafy trees; the weather is warm and wet year-round; few plants live on the dark forest floor. |  | 106 |
| 3308847341 | Swamp | A type of freshwater wetland that consists of spongy, muddy land full of water. |  | 107 |
| 3309201850 | Holdfasts | Root like structures that some organisms have to help them hold on to rocks. |  | 108 |
| 3309209585 | Sargasso Sea | An area in the middle of the Atlantic Ocean in which green seaweed grows thick. |  | 109 |
| 3309220258 | Treeline | The limit of the area that trees can grow in on Earth. Above it, it's too cold for trees to grow. |  | 110 |
