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In this quick activity (located on page 2 of the PDF under GPS: Balloon Fiesta Activity), learners will see the effects of convection and understand what makes hot air balloons rise.

This activity about density provides instructions for making a miniature "lava lite" with just salt, oil, water, and food coloring.

Learners investigate how the temperature of water affects its density.

In this activity, learners practice the steps involved in a scientific investigation while learning why ice formations on land (not those on water) will cause a rise in sea level upon melting.