Evaporation, The sun heats a puddle after the rain, and the water slowly disappears into the air., Respiration, A person breathes in oxygen and later exhales carbon dioxide into the air., Photosynthesis, A tree absorbs carbon dioxide and sunlight to make food and releases oxygen into the air., Transpiration, A field of crops adds moisture to the air as water escapes from the leaves of the plants., Condensation, Warm air rises, cools high in the sky, and tiny water droplets come together to form clouds., Storage, After a storm, water fills lakes, rivers, and underground wells where it stays until used., Precipitation, Dark clouds grow heavy, and soon water falls to the ground as rain., Decomposition, Fallen leaves on the ground rot and return carbon to the soil and atmosphere., Combustion, A pile of firewood burns, and smoke carrying carbon dioxide rises into the sky., Water Cycle, Water from the ocean heats up under the sun, rises into the air, forms clouds, falls as rain, and flows back to the sea to start the process again.

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