Minds ON

• What runs and never gets tired?• What runs and has no feet, roars but has no

mouth?

Resources: Water

• If the water in this 20 L bucket represents the water on Earth, how much do you think is in a form that is available to humans?

Review

• 97.5% of Earth’s water is salt water

• 2.5% of Earth’s water is fresh water– 98.7% of fresh water is frozen/underground– 0.3% of fresh water is surface water

• Less than 1% of Earth’s water is usable for humans.

WatershedAn area of land into which all of the rivers, streams

flow into a larger body of water.

A watershed can be affected by:- opography of the land (shape, slope)- Geology (type of rock)- Climate (drought vs. rainy season)- Vegetation (density)- Agricultural, industrial, urban development

How much fresh water is in the Great Lakes?

How much fresh water is in the Great Lakes?

21% of the world’s surface fresh water is in the Great Lakes

How did Canada get all this water?

How does water shape the land?

Local Great Lakes Issues

• Great lakes water levels dropping due to climate change

• Pressure to send water from Great Lakes to southern USA

• Pollution from industries surrounding lakes