How do we know what layers are inside of the earth since we can't dig that deep? The first in a series of five lessons introduces the concept of sampling and testing a hypothesis about what is inside a sphere. Using two spheres that look the same, but are clearly different weights, scholars must decide how to find out what is inside without destroying the ball.
- Include photos from fault lines or volcanoes near you in the introduction to the lesson
- If possible, have a variety of clay balls that are the same size, but different weights — some filled with metal, some hollow, etc.
- Assumes some basic prior knowledge of plate tectonics
- Hands-on, inquiry-based lesson adjusts easily to take up as little or as much time as necessary
- Provides resources from multiple continents
- Video includes closed captioning for the hearing impaired