Additional+Resources

This link goes perfectly with Spheres of Earth.
It's a computer based activity where students can get more information about the 4 processes and then determine how long the process takes.

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Check out this amazing animation! Gives you a perspective of size, starting in the middle with a human.
This is probably the most awesome animation that I ever received. Just slide the bar at the bottom left or right. Be sure to go BOTH ways on the sliding scale. Click on each icon for interesting facts.