Section Two: Surface Water Flashcards
What do you call the streams and smaller rivers that feed into a main river…
Tributary
A river and all the streams and smaller rivers that flow into it together make up a…
River System
What are nutrients that build up in a lake?
Eutrophication
The area that supplies water to a river system is called a…
Watershed
A stream that flows into two different rivers is part of a…
Divide
A pond is usually _____ than a lake.
Shallower
How is a reservoir different from a pond or lake?
It is man-made.
How can lakes change? (2 ways)
Eutrophication, and human activities.
How can a volcano help a lake?
Rivers are blocked by empty craters, mud, and lava. It’ll form a lake.
How can eutrophication change a lake into a meadow?
When a thick algae layer becomes to thick, it blocks sunlight. So, plants cant carry out photosynthesis, and they’ll die. Without food and oxygen from the plants, animals will die. Decaying material from dead organisms pile up at the bottom, making the lake shallower. As the area fills, land and plants grow in the mud. Eventually, the area fills in with plants, and a meadow replaces the former lake.
Though eutrophication occurs naturally, how can human activities cause or increase it?
Fertilizer
Algae can overgrow in a lake when the lake contains to many…
Nutrients
When a lake is created by the building of a dam, the lake is called a…
Reservoir
The ___________ River watershed covers almost 1/3rd of the United States.
Mississippi
Lakes can disappear due to…
Eutrophication
