- a clear glass or jar
- vegetable oil
- Put water into the jar until it is half full.
- Pour vegetable oil into the jar. The oil floats on the water.
- Take a spoonful of salt, and pour it into the jar all at once. It sinks through the oil, and down through the water, taking some oil with it.
- Keep watching as oil blobs slowly begin to rise up through the water. Try adding other things, like sugar, sand, or flour.
What did you use to make oil blobs sink and rise?