Wednesday, August 27, 2014

Where is the water?

Sites related to GeogSplace 
Spatialworlds blog
Australian Geography Teachers' Association website

Geographical thinking  

"Sustainability is both a goal and a way of thinking"
The distribution of water on Earth: not a lot of fresh water really!!!

The image above shows that in comparison to the volume of the globe the amount of water on the planet is very small - and the oceans are only a "thin film" of water on the surface.
The blue spheres represent all of Earth's water, Earth's liquid fresh water, and water in lakes and rivers

The largest sphere represents all of Earth's water, and its diameter is about 860 miles (the distance from Salt Lake City, Utah, to Topeka, Kansas). It would have a volume of about 332,500,000 cubic miles (mi3) (1,386,000,000 cubic kilometers (km3)). The sphere includes all the water in the oceans, ice caps, lakes, and rivers, as well as groundwater, atmospheric water, and even the water in you, your dog, and your tomato plant.

The ‘Blue Planet’

Water is widely distributed on Earth as freshwater and salt water in the oceans. The Earth is often referred to as the "blue planet" because when viewed from space it appears blue. This blue color is caused by reflection from the oceans which cover roughly 71% of the area of the Earth.

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