Source - The beginning or start of a river, Course - The route a river takes to the sea, Confluence - The point at which two rivers or streams join together., Tributary - A stream or smaller river that flows into a larger stream or river., Mouth - The point where a river comes to an end, usually when entering the sea., Drainage basin - The area of land drained by a river., Watershed - The area of high ground that separates two drainage basin., Estuary - The part of a river mouth where the fresh water from the river meets the salt water of the sea or ocean. , The Youthful stage is also known as..... - The upper course., The mature stage is also known as..... - The middle course., The old stage is also known as..... - The lower course., The river wears away & breaks up the landscape along its channel. - Erosion, The river carries the material that it has eroded. - Transportation, The river drops the material that it was carrying. - Deposition, The physical force of the moving water. - Hydraulic Action, Small stones carried by the river wear away & break off rock along the riverbed and banks. - Abrasion, Small stones in the river are worn down and broken up as they hit off each other. - Attrition, Rocks such as limestone and soil are dissolved by acids in the water. - Solution, The material transported by the river. - Load, The larger stones are rolled along the bed of the river. - Traction, The smaller pebbles are bounced along the bed of the river. - Saltation, Light materials such as sand & silt float along in the water. - Suspension, Solution - Other materials dissolve in the water and are carried along by the river. , A downward slope. - Gradient,

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