This toy uses components of force to walk and to stop at just the right time!

A bob, or mass, hangs from a string attached to the front of the walking men. Watch as the string almost draws the vectors that make the toy work.

Walking toy (these are called [...]

Objective:
To introduce the topic of seismic waves produced by earthquakes.

Standards:
Structure of the Earth System (plate tectonics and its relation to earthquakes), Transfer of Energy (energy types, characteristics, and transfer properties), and Interaction of Energy and Matter (waves have energy and can transfer energy when they interact with matter).

Materials:
Pieces [...]