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In this activity, learners use basic measurements of the Earth and pieces of rock and iron to estimate the mass of the Earth.

In this activity, learners make a 3-D model of magnetic fields by inserting a small, strong magnet into a sphere.

In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

In this activity, learners use crayons to draw conclusions about rocks and the rock cycle.