## Earthquake Machine: Demonstration of the 1-Block Model (introduction)

### How can you model earthquakes in the classroom?

Mechanical model of the earthquake process using a wood block, sandpaper, and rubber bands to show how "Forces, Faults, and Friction" interact as elastic energy is slowly stored as the rubber back stretches. Then releases an "earthquake when the block overcomes friction. This block-and-sandpaper model can be used to teach the concept of elastic rebound and how energy is stored and released. Earthquakes can provide a useful context for teaching or reviewing many basic physics concepts, such as sliding and static friction, forms of energy and conversion from one form to another, and the elastic properties of different materials.

#### Keypoints:

• Block-and-sandpaper model can be used to teach the concept of elastic rebound and how energy is stored and released.
• The rubber band represents the elastic elements in the Earth
• Basic physics concepts include sliding and static friction, forms of energy and conversion from one form to another, and the elastic properties of materials.
• Students can graph the motion and strain

Level: Novice

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## Related Lessons

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## Related Videos

This demonstration shows that rocks are elastic by squeezing a slit core of rock.

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This video shows how to build the "Earthquake Machine", a physical model that represents the “earthquake cycle”, the slow accumulation of elastic energy in rocks on or adjacent to a fault followed by rapid release of elastic energy during an earthquake.

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THE two-block "Earthquake Machine" uses two blocks with different grit sandpaper to model interactions between adjacent patches along a fault.

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## Related Animations

Animation of the single-block "Earthquake Machine", a mechanical model of the earthquake process using a wood block, sandpaper, and rubber bands. This model shows how "Forces, Faults, and Friction" interact as elastic energy is slowly stored when the rubber back stretches and then is rapidly released as the block jerks during an "earthquake".

Animation Novice