Lecture Two Notes
The circulation of earth’s water supply between various reservoirs (large bodies of water, large places on the
planet where water can be stored ex: Oceans) and states.
Oceans contain 96% of earth’s water supply largest
Ice (glaciers, ice caps) contain 3% of earth’s water supply
Ground water supply contains about 1% of earth’s water supply
Lakes and rivers or surface water contain .009% of earth’s water supply. (NOT TESTED ON THIS)
3) How much water is there on earth?
a) 1.46 x 10 km
b) Land area of the United States is 9.63 x 10 km 2
c) Divide volume of US by area.. get a length (height)
d) = 152 km
4) Once water hits the earth’s surface what happens to it:
a) transporation is how plants release water back into the atmosphere
b) infiltration hits the earth’s soil and seeps into it. Once it’s in the ground it can flow as groundwater,
ultimately back into the ocean.
c) If it doesn’t infiltrate or get taken up by a plant, it can run off, also known as overland flow, simply
just flowing over the earths surface. When runoff concentrates into stream flow it can become
streams and rivers.
5) Processes of water transfer
a) Evaporation=from earth’s surface to atmosphere