GEOLOGY

Detailed explanation-1: -A tributary is a freshwater stream that feeds into a larger stream or river. The larger, or parent, river is called the mainstem. The point where a tributary meets the mainstem is called the confluence. Tributaries, also called affluents, do not flow directly into the ocean.

Detailed explanation-2: -These smaller streams are called tributaries. Streams create channels by wearing down rock and carrying it and other sediment downstream. This process is called erosion.

Detailed explanation-3: -A stream or river that flows into a larger river is called a tributary. The Amazon river has many tributaries joining it.

Detailed explanation-4: -One method of classifying streams is through physical, hydrological, and biological characteristics. Using these features, streams can fall into one of three types: perennial, intermittent, and ephemeral.

Detailed explanation-5: -Streamflow, or channel runoff, is the flow of water in streams and other channels, and is a major element of the water cycle.