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Water Cycle: Movement of water between the oceans, atmosphere, living things and land. Condensation: change of state from a gas to a liquid Evaporation: change of state from a liquid to a gas Precipitation: any form of water that falls to the Earth’s surface from the clouds Transpiration: the loss of water vapors from the leaves of plants Nitrogen Cycle: Movement of nitrogen between the environment and living things. * Nitrogen is important for building proteins and DNA in living things. Carbon-Oxygen Cycle: Exchange of carbon and oxygen between living things and the environment. Photosynthesis: process in which plants use carbon dioxide and water to make sugar (glucose) and oxygen Respiration (Cellular Respiration): process in which living cells use oxygen break down sugars to release energy, carbon dioxide and water.