Grade Level: Preschool through 1st Grade; Type: Physics
See what happens when two fluids that have different densities get together.
- Disposable cup
- Food color (any dark color)
- Small funnel
- Vegetable oil
- Pencil and paper and a crayon or colored pencil that matches the food color (alternatively: a camera)
- One test tube with cap
- Optional: some old newspaper and a smock
- You might want to do this experiment over a sink or some old newspaper, it can get messy! Also, a smock might be a good idea.
- If you are using the paper-and-pencil option, use the pencil to draw four or five pictures of the test tube on the paper.
- Fill the cup partway with water and put a few drops of the food color in it. Swirl it around until it’s well mixed.
- Use the funnel to fill the test tube halfway with the colored water.
- Record and present results.
Terms/Concepts: fluids, convection, cumulus clouds, upwelling, density
References: Phineas and Ferb Science Lab, published by Scholastic, Inc., pp. 16-17 (2011).
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