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In this activity, learners work in groups to determine the mass and volume of four samples: glass marbles, steel washers or nuts, pieces of pine wood, and pieces of PVC pipe.

In this activity, learners can create five-layer density columns by employing one of three (or all) methods.

In this activity, learners investigate convection by using food coloring and water of different temperatures.

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