Teaching in The Learning Web

Global Change
The Earth is a time machine that has been changing throughout its 4.5 billion-year history. By looking at tree rings, past climates can be described and radioactive decay can be used to determine the age of rocks.

Working with Maps
Maps of the Earth are illustrations of how we have visualized our planet. Throughout our history, explorers and scientists have tried to answer the questions of "where are we?" and "where are we going?" Discover and explore the many meanings of maps.

Earth Science
The Earth is a dynamic planet and is rich with stories of its change. One story is that of plate tectonics and how the Earth's surface is continually shifting. Find out why the Earth is so restless and what causes earthquakes to shake the ground and volcanoes to erupt with great force.



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Teaching in The Learning Web | About | What's New | Global Change | Earth Science | Working With Maps | Other Sites | Teaching in The Learning Web Credits | The Learning Web

Contact: Maura Hogan

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http://www.usgs.gov/education/learnweb/ last updated 04/01/1997