Using your hands, shape a round ball of clay for each of the four layers. Line each ball up with your ruler and adjust until their diameter (widest part) matches the length below. Be as exact as you can! Remember, the colors are just a suggestion. Substitute the colors you have.
Layer 1: Red - 1 cm diameter
Layer 2: Orange - 2.75 cm diameter
Layer 3: Yellow - 5 cm diameter
Layer 4: Blue - 1.5 cm diameter
Start with the red clay sphere. This will represent the first layer: the Inner Core.
For Layer 2, take the orange clay. Carefully flatten & mold the orange clay evenly around the red Inner Core to represent the Outer Core. Gently roll into a smooth sphere.
For Layer 3, take the yellow clay. Carefully flatten & mold the yellow clay evenly around the orange Outer Core to represent the Mantle. Gently roll this into a smooth sphere.
Finally, take the blue clay. Carefully flatten & mold the blue clay to completely cover your Earth model with Crust. (This may be a challenge).
Cut your model in half. To do this using dental floss, set your model on a table, and draw the floss down through your model with a back & forth motion. You may also use a sharp knife.
If you were not able to gather these materials (this was Wednesday's task), watch this video instead and draw a color diagram of the model on paper. This is not the same scale as the directions above. Or, help a member of your group and record their measurements.