- A foam ball or other round object
- Paint
- A brush
- A pencil
- A ruler
- A protractor
- Scissors
- Glue
Instructions:
1. Paint the foam ball white. This will be the base for your rock cycle.
2. Use a pencil and ruler to draw three circles on the ball, evenly spaced around the circumference. These will be the three rock types: igneous, sedimentary, and metamorphic.
3. Use a protractor to divide each circle into three equal sections. These will represent the different stages of each rock type: formation, weathering, and erosion.
4. Paint each section of the circles according to the following key:
- Igneous: red for formation, orange for weathering, and yellow for erosion
- Sedimentary: blue for formation, green for weathering, and brown for erosion
- Metamorphic: purple for formation, black for weathering, and white for erosion
5. Cut out three small triangles from the foam ball, one for each rock type. These will be the arrows that show the flow of the rock cycle.
6. Glue the arrows to the ball, pointing from one stage to the next.
Your 3D rock cycle is now complete! This model can be used to demonstrate how rocks are formed, weathered, and eroded, and how they cycle through the different stages of the rock cycle.
