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In this activity, learners design a crushing test and discover that identifying and controlling the variables may be difficult.

In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.

Learners carefully look at four known household crystals.

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

In this activity, learners are challenged to lift a floating ice cube out of a glass of water using just one end of a piece of string.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

In this chemistry activity (page 3 of the PDF), learners will learn about crystals by growing their very own.

In this activity on page 10 of the PDF, learners detect the amount of energy that can flow through a sodium chloride electrolyte solution with a light sensor.