The science or practice of farming, including cultivation of the soil for growing crops and raising animals to provide food, wool, and other products. - agriculture, A set of layers of gases surrounding Earth or another planet. - atmosphere, All living things on Earth - biosphere, A biological community of interacting organisms and their physical environment. - ecosystems, Earth as one integrated system of four interconnected parts: geosphere, atmosphere, hydrosphere, biosphere. - earth's systems, Movement of rocks and soil across Earth's surface by gravity, wind, or water. - erosion, The process of turning from liquid into vapor (gas). - evaporation, Water with very low salt content, different from seawater or brackish water. - freshwater, The solid portion of Earth including the crust and upper mantle of Earth. - geosphere, A slowly moving mass of ice formed by accumulated, compacted snow on mountains or near poles. - glacier, Water held underground in the soil or in pores and cracks in rock. - groundwater, A tropical storm with winds ≥74 mph, usually with heavy rain, thunder, and lightning. - hurricane, All Earth's surface waters (lakes, seas) and sometimes water above the surface (clouds). - hydrosphere, A dry area on the leeward side of mountains where peaks block rain, creating a "shadow" of dryness. - rain shadow, Broken rock and mineral particles moved by wind, water, ice, or gravity. - sediment, Water that is good for drinking without fear of poisoning or disease. - potable, Rain, snow, sleet, or hail that falls to the ground. - precipitation, winds that blow consistently in a given direction over a particular region on Earth. - prevailing winds, a large natural or artificial lake used as a source of water supply. - reservoir, A natural solution containing high concentrations of dissolved salts (usually seawater). - saltwater, A precise, sterilized mixture of water and sodium chloride, usually at 0.9% concentration (matching bodily fluids). - saline, Water located on top of Earth's surface such as rivers, lakes, and wetlands. - surface water, Avoiding depletion of natural resources to maintain ecological balance. - sustainability, The continuous movement of water on, above and below the surface of Earth. - water cycle, The process of breaking down by wind, water, or other natural agents. - weathering, The laying down of sediment carried by wind, flowing water, the sea or ice - deposition, The change in atmospheric conditions, typically increased precipitation, caused by air masses being forced upward over elevated terrain like mountains. As air rises, it cools and condenses, releasing moisture on the windward side. The rain shadow is the resulting dry area on the leeward (downwind) side, caused by descending, warming, and dehydrated air. - orographic effect, Saltwater is what percentage of the Earth's water? - Approximately 97%, Freshwater is what percentage of the Earth's water? - Approximately 3%,

EARTH'S SYSTEMS

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