1
We observe the different angles between the sun, earth, and moon by the phases of the moon we see each month. Students, acting as the earth, will see differences in light and dark sides of their hand-held moon.
Grade Level   6 7 8 9 10 11 12
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2
Just as air can have different densities, water can have different densities as well. As the salinity of water increases, the density increases as well. Fresh eggs will float in saltwater, but will sink in freshwater. This will show that as the salinity increases the density also increases.
Grade Level   4 5 6 7 8 9 10 11 12
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3
We all know the oceans are salty but so are other sources of water. The oceans have a salinity (salt content) of 35%. The Dead Sea has an average salinity of 290%, almost nine times saltier than the oceans. But what actually does that mean? Just how salty tasting are these various bodies of water?...
Grade Level   6 7 8 9 10 11 12
Classroom Activities Curricula and Instruction
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4
"Water freezes at 32 degrees Fahrenheit (0 degrees Celsius). Adding salt to water lowers the freezing point. How low the freezing point goes depends upon the amount of salt in the water. The students will make homemade ice cream but the """"freezing times"""" will vary using different amounts of...
Grade Level   4 5 6 7 8 9 10 11 12
Classroom Activities Curricula and Instruction
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