- Marbles, salt, and water to teach density. First, fill a measuring container with marbles, then add in the salt. You can add roughly 130 ml of salt into the container of marbles. Then add 70 ml water. This shows how density works.
- Density is how much matter is in a given space. It is a property of matter, not the matter.
Density Experiment: Use a ball of clay and straws to create test tubes. Yellow= 2 cups of
salt, green= 1 cup of salt and the red is pure water. Then just add food
coloring to the mixtures. The salt creates the density. You can use alcohol to
go on top of the fresh water.
The long straw is the assessment. Have students correctly layer the colors.
As a follow up, have students turn their clay test tubes upside down before throwing out the straws. Discuss why the colors mix and do not stay separated.
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