Hydrologists create a concept map about how water is used and a sentence strip defining water and describing its unique properties. Small groups work together to fill a small milk carton and compute the mass of water inside. The next day, after freezing the water, they make new observations of the properties. 

Concepts

states of matter, matter, properties of water, water, the water cycle

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Additional Tags

properties of water, states of matter, water cycle, science

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Pros

• Student journal pages provided for recording answers and observations

Cons

• Requires a small milk carton for each team; you will need to have students start bringing some in before the day of the lesson, or use paper cups that can be just as easily peeled off of the frozen blocks
• The activity is only loosely related to the title of the lesson; it might be more approprately called "Properties of Water"