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8.4  Investigating Earth



http://www.ocean.washington.edu/people/grads/scottv/exploraquarium/scaletrip/images/apollo.earth.500.jpg


INTRODUCTION


Looking at Earth from space must be a fantastic experience.   The blue planet with swirling clouds of water vapour.  But what’s it made of?

This topic is about Earth - its lithosphere, hydrosphere and atmosphere.

We rely on the lithosphere for most of our resources;

We rely on the hydrosphere for our water;

We rely on our atmosphere to keep the planet at the right temperature.

It should seem obvious that we need to understand these “spheres”  for our future well-being.


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