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Water Wire: Electricity Flowing Through Water
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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.
Test Density with a Supersaturated Solution
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Learners create three solutions with different levels of salinity. They compare the density of these solutions by coloring them and layering them in a clear plastic cup and in a soda bottle.
Comparing Crystals
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In this chemistry activity (page 3 of the PDF), learners will learn about crystals by growing their very own.
We all Scream for Ice Cream
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In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.
TerrAqua Investigation Column: What is the Land-Water Connection?
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In this investigation, learners plant seeds in a 2-liter bottle filled with soil that is connected to a water source below. Over the next few weeks, learners observe how the plants grow.
Curious Crystals
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Learners carefully look at four known household crystals.
Let's Go Ice Fishing
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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.
Sugar/Salt Crystals
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In this chemistry activity (page 1 of the PDF), learners will observe a physical change.
Crushing Test
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In this activity, learners design a crushing test and discover that identifying and controlling the variables may be difficult.
Make a Salt Volcano (Lava Lite)
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This activity about density provides instructions for making a miniature "lava lite" with just salt, oil, water, and food coloring.
Carrying Charges: Testing for Conductivity
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Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up).
Crystals: Grow Your Own Garden
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In this simple activity (on page 2 of the PDF), learners make a crystal garden using salt, water, and a brick.
Build A Hydrometer
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In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.