Learn about the layers that make up the earth and how they interact to affect the landscape. STEM Challenge: making shake tables and earthquake-resistant structures.

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When objects are in physical contact with one another and rub together there is a molecular force that acts on them that limits their ability to move. That resistance in motion is called friction. Learn how friction affects us every day. STEM Challenge: make a hovercraft from a compact disc.

When objects are in physical contact with one another and rub together there is a molecular force that acts on them that limits their ability to move. That resistance in motion is called friction. Learn how friction affects us every day. STEM Challenge: make a hovercraft from a compact disc.

Friction

Bridges are a natural part of human history and ingenuity and are as simple as crossing a fallen tree across a creek. However, in time people wanted to be able to span larger areas, which led to engineering different solutions. STEM Challenge: make a truss bridge out of straws.

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