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Transcript
The Oxygen Cycle Photosynthesis • The process by which light energy is converted to chemical energy Plants • The oxygen cycle starts off in plants. • Plants use photosynthesis to produce carbohydrates and oxygen • Plants “breathe” in carbon dioxide and “breathe” out oxygen Water • When the water in a steam enters a pond, microorganisms in the pond begin to break down organic matter, consuming oxygen in the process. Organism • Last in the cycle are the organisms • Their role in the cycle begins with carbon dioxide in the atmosphere. • Animals breathe that oxygen and both plants and animals use the sugars for energy. Weathering • Physical and chemical process in which solid rock exposed at earths surface is changed to separate solid particles and dissolved materials Respiration & Decay • Mechanisms in which animal life and bacteria consume oxygen and release carbon dioxide Burial • The oxygen left inside of people after they have been buried in the ground gets absorbed by the soil. Photolysis • The chemical decompositi on of materials under the influence of light
