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Weathering is the process where rock is dissolved, worn away or broken down into smaller and smaller pieces. There are mechanical, chemical and organic weathering processes.

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Erosion is the process by which sediment and other materials are moved from one place to the other. Eroded materials in streams may come from the streams own bed and banks or from materials carried to the stream by rainwater runoff.

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Deposition is the process by which eroded material is dropped. Deposition occurs when gravity's downward pull on sediment is greater than the push of flowing water or wind. This usually happens when the water or wind blows down.

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Wind and water cause small pieces of rock to break off at the side of a mountain. Weathering can occur due to chemical and mechanical processes.

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Typically, erosion refers to the gradual wearing away of soil, dirt, rock, or other land structures over time through natural forces such as water or wind.

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An example of deposition is the process by which, in sub freezing, air, water vapor changes directly to ice without first becoming a liquid.

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The basics for physical, biological and chemical weathering with images.

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Erosion and Weathering: Earth Time Lapse