Nature Example
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The Mouth

This is the end of the river, where it flows into a sea or a large lake. When the river meets the sea, it often widens into an 'estuary', where fresh river water mixes with salty sea water.

Its job is to:

Empty the river's water into the sea.

💡 Fun Facts

  • The River Thames flows into the North Sea at its wide estuary.
  • The Severn Estuary, where the River Severn meets the sea, has one of the highest tidal ranges in the world (the difference between high and low tide).
  • Many of the UK's biggest cities and ports are built at the mouths of rivers, like London, Liverpool (River Mersey), and Bristol (River Avon).