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In this activity, learners explore how salt water freezes in comparison to fresh water.

In this activity, learners make a paper model of a polymer, then make Silly Putty, an actual polymer.

The "Rocket Reactions" activity is an exciting way to learn about how materials interact, behave, and change.

In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

Many people get water from a source deep underground, called groundwater.

In this activity, learners investigate soil erosion. Learners set up a simulation to observe how water can change the land and move nutrients from one place to another.

In this activity, learners discover that there is space between molecules even in a cup "full" of water. They first fill a cup with marbles, and then add sand to fill the gaps between the marbles.

In this activity, learners conduct three experiments to examine temperature, the different stages of the water cycle, and how convection creates wind.

In this activity, learners build models of comets, using edible materials, to learn about comets' structure.

Build a fruit fly trap out of a 2-liter plastic bottle and some rotten fruit! Fruit flies are easy to catch in warm weather. Once you catch some, you will be able to see their life cycle up-close.

In this activity, learners create a biosphere in a baggie.

In this physics activity (page 10 of the PDF), learners will explore how energy from moving water can be used.