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Handout
NASA

Nasa Space Place: What Is an Earthquake?

For Students 3rd - 8th
Discover why earthquakes happen, how we measure them, and why they only happen on Earth.
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Graphic
abcteach

Abcteach: Earth

For Teachers 3rd - 5th
[Free Registration/Login Required] Ready made worksheets for any earth science unit on water cycles, the layers of the earth, or volcanoes.
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Interactive
The Tech Interactive

The Tech: The Core of the Matter

For Students 3rd - 8th
Use this website as a great introduction to one of the basic parts of the inside of the earth, the core. Also provides a short description and cross-section of the Earth.
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Lesson Plan
The Franklin Institute

The Franklin Institute: Earth Bowl

For Teachers 3rd - 5th
This activity from The Franklin Institute demonstrates the layers of the earth using gelatin, pudding, graham crackers, and a few other items. The learners actually construct a representation of the earth that they can eat.