Fresh water unit Flashcards
(13 cards)
What is an esker?
A ridge of sand/gravel formed by meltwater flowing under a glacier.
What is a moraine?
A build-up of rocks and gravel left by a glacier
What is a drumlin?
A small hill formed when glaciers move over moraines.
What does it mean when a river meanders?
The river curves due to erosion on one bank and deposition on the other.
How are weathering and erosion related?
Weathering breaks rock down; erosion moves it away.
What is the Great Ocean Conveyor Belt?
A deep ocean current system driven by temperature and salinity.
How does temperature affect ocean currents?
Cold water sinks (denser); warm water rises (less dense).
Gradual vs. short-term ecosystem changes?
Gradual = slow, like succession. Short-term = sudden, like disasters.
What is turbidity?
Cloudiness in water caused by particles.
What is potable water?
Water safe to drink.
What happens when fertilizers enter water?
Algae bloom, low oxygen, fish die.
What is reverse osmosis?
A filtration method to remove impurities from water.
Where is most fresh water stored?
In glaciers, lakes, rivers, and underground
