The process of sediment moving or being weathered away by wind or water.

Water that moves over Earth's surface, because it doesn't infiltrate the ground.

Water moving from the liquid state to the gaseous state.

Observations described in words or letters.

A competitor in the Hunger Games; eg, Katniss Everdeen volunteered as a tributary in place of her sister.

A mass of frozen water slowly moving over land; eg, you can see tributaries in Tributary National Park, in Montana.

A larger stream or river that flows into a smaller one; eg, the Mississippi River is a tributary of the Kanawha River.

A smaller stream or river that flows into a larger one; eg, the Kanawha River is a tributary of the Ohio River.

The area near a river that floods when water levels get to be too high.

The area near a river that looks boring or dull.

The process of water levels going over a river or stream bank.

Water gathering on the surface of the Earth because it doesn't seep into the ground.