A simple lava lamp .
You can do this at home
You will need the following.
A tall glass.
Three quarter fill a tall glass with water. Add enough cooking oil to make a 2cm deep layer.
|Pour salt onto the
layer for 5 seconds as shown on the left.
Notice how the oil will sink and rise from the bottom. Repeat this by adding more salt. Click to see a 120kb movie.
The oil will sink and rise as shown on the right.
Click to see a 120kb movie..
Using the words density, soluble and buoyant explain how this simple lava lamp works.
Click once to show the solution