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Environmental issues Year 8. http://www.classzone.com/books/earth_science/terc/content/investigations/es0103/es0103page02.cfm. The Earth is made up of four different spheres: Atmosphere: The air surrounding Earth Lithosphere: The rocky surface of the Earth Hydrosphere: The water on Earth
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http://www.classzone.com/books/earth_science/terc/content/investigations/es0103/es0103page02.cfmhttp://www.classzone.com/books/earth_science/terc/content/investigations/es0103/es0103page02.cfm The Earth is made up of four different spheres: Atmosphere: The air surrounding Earth Lithosphere: The rocky surface of the Earth Hydrosphere: The water on Earth Biosphere: The area on Earth where life exists
http://www.strategies.org/docs/essea_29oct/hilk4/intro/spheres.htmlhttp://www.strategies.org/docs/essea_29oct/hilk4/intro/spheres.html