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| 2800306929 | Climate | the average weather that occurs in a region over a long period of time | 0 | |
| 2800309244 | Weather | the short-term condition of the atmosphere in a local area, which include temperature, humidity, clouds, precipitation and wind speed | 1 | |
| 2800311771 | Troposphere | a layer of the atmosphere closest to the surface of the earth, extending up to approximately 16 km | 2 | |
| 2800314055 | Stratosphere | the layer of the atmosphere above the troposphere, extending roughly 16 to 50 km above the surface of earth | 3 | |
| 2800315933 | Albedo | the percentage of incoming sunlight reflected from a surface | 4 | |
| 2800317839 | Saturation point | the maximum amount of water vapor in the air at a given temperature | 5 | |
| 2800318777 | Adiabatic cooling | the cooling effect of reduced pressure on air it rises higher in the atmosphere and expands | 6 | |
| 2800320155 | Adiabatic heating | the heating effect of increased pressure on air as it sinks toward the surface of the earth and decreases in volume | 7 | |
| 2800322186 | Latent heat release | the release of energy when water vapor in the atmosphere condenses into liquid water | 8 | |
| 2800324228 | Atmospheric convection current | global patterns of air movement that are initiated by the unequal heating of earth | 9 | |
| 2800326389 | Hadley cell | a convection current in the atmosphere that cycles between the equator and 30 N and 30 S | 10 | |
| 2800329806 | Inter tropical convergence zone (ITCZ) | the latitude that receives the most intense sunlight , which causes the ascending branched of the two Hadley cells to converge | 11 | |
| 2800332093 | Polar cell | a convection current in the atmosphere, formed by air that rises at 60 N and 60 S and sinks at poles 90 N and 90 S | 12 | |
| 2800334372 | Ferrell cell | a convection current in the atmosphere that lies between Hadley cells and polar cells | 13 | |
| 2800337182 | Coriolis effect | the deflection of an object's path due to the rotation of earth | 14 | |
| 2800338723 | Rain shadow | a region with dry conditions found on the leeward side of a mountain range as a result of humid winds from the oceans causing precipitation on the windward side | 15 | |
| 2800342845 | Gyre | a large scale pattern of water circulation that moves clockwise in the northern hemisphere and counterclockwise in the southern hemisphere | 16 | |
| 2800346380 | Upwelling | the upward movement of ocean water toward the surface as a result of diverging currents | 17 | |
| 2800347984 | Thermohaline circulation | an oceanic circulation pattern that drives the mixing of surface water and deep water | 18 | |
| 2800350909 | El Nico-Southern Oscillation (ENSO) | a reversal of wind and water currents in the South Pacific | 19 | |
| 2800352686 | Terrestrial biome | a geographic region categorized by a particular combination of average annual temperature, annual precipitation, and distinctive plant growth forms on land | 20 | |
| 2800365732 | Aquatic biome | an aquatic region characterized by a particular combination of salinity, depth, and water flow | 21 | |
| 2800368086 | Tundra | a cold and treeless biome with low growing vegetation | 22 | |
| 2800369472 | Permafrost | an impermeable, permanently frozen layer of soil | 23 | |
| 2800371801 | Boreal forest | a forest biome made up primarily of coniferous evergreen trees that can tolerate cold winters and short growing seasons | 24 | |
| 2800376106 | Temperate rainforest | a coastal biome typified by moderate temperatures by moderate temperatures and high precipitation. | 25 | |
| 2800393175 | Temperate seasonal forest | A biome with warm summers and cold winters with over 1 m (39 inches) of precipitation annually. | 26 | |
| 2802064859 | Woodland/shrubland | A biome characterized by hot, dry summers and mild, rainy winters. | 27 | |
| 2802065578 | Temperate grassland/cold desert | A biome characterized by cold, harsh winters and hot, dry summers. | 28 | |
| 2802066352 | Tropical rainforest | A warm and wet biome found between 20 degrees North and 20 degrees South of the equator, with little seasonal temperature variation and high precipitation. | 29 | |
| 2802068731 | Tropical seasonal forest/savanna | A biome marked by warm temperatures and distinct wet and dry seasons. | 30 | |
| 2802070052 | Subtropical desert | A biome prevailing at approximately 30 degrees North and 30 degrees South, with hot temperatures, extremely dry conditions, and sparse vegetation. | 31 | |
| 2802071225 | Littoral zone | The shallow zone of soil and water in lakes and ponds where most algae and emergent plants go. | 32 | |
| 2802071900 | Limnetic zone | A zone of open water in lakes and ponds. | 33 | |
| 2802072547 | Phytoplankton | Floating algae. | 34 | |
| 2802072881 | Profundal zone | A region of water where sunlight does not reach, below the limnetic zone in very deep lakes. | 35 | |
| 2802075357 | Benthic zone | The muddy bottom of a lake, pond, or ocean. | 36 | |
| 2802076201 | Oligotrophic | Describes a lake with a low level of productivity. | 37 | |
| 2802076560 | Mesotrophic | Describes a lake with a moderate level of productivity. | 38 | |
| 2802077098 | Eutrophic | Describes a lake with a high level of productivity. | 39 | |
| 2802078204 | Freshwater wetlands | An aquatic biome that is submerged or saturated by water for at least part of each year, but shallow enough to support emergent vegetation. | 40 | |
| 2802079223 | Salt marsh | A marsh containing nonwoody emergent vegetation, found along the coast in temperate climates. | 41 | |
| 2802080109 | Mangrove swamp | A swamp that occurs along tropical and subtropical coasts, and contains salt tolerant trees with roots submerged in water. | 42 | |
| 2802082127 | Intertidal zone | The narrow band of coastline between the levels of high tide and low tide. | 43 | |
| 2802082877 | Coral reef | The most diverse marine biome on Earth, found in warm, shallow waters beyond the shoreline. | 44 | |
| 2802084901 | Coral bleaching | A phenomenon in which algae inside corals die, causing the corals to turn white. | 45 | |
| 2802085827 | Open ocean | Deep ocean water, located away from the shoreline where sunlight can no longer reach the ocean bottom. | 46 | |
| 2802087636 | Photic zone | The upper layer of ocean water in the ocean that receives enough sunlight for photosynthesis. | 47 | |
| 2802088329 | Aphotic zone | The deeper layer of ocean water that lacks sufficient sunlight for photosynthesis. | 48 | |
| 2802089138 | Chemosynthesis | A process used by some bacteria in the ocean to generate energy with methane and hydrogen sulfide. | 49 |
