Sink/Float

Most candy sinks in water, because sugar is denser than water.  But some candy floats.  Why?

One candy bar floats; one sinks.

What you need:

• Different kinds of candy, such as chocolates, sugar candy, 3 Musketeers bar, Kit Kat bar
• water

What to do:

1. Drop the candy in the water.
2. Watch what happens: does it sink or float?
3. If you have a 3 Musketeers bar, poke it to break the chocolate shell.  Do you see bubbles escaping?

What’s happening:
Some kinds of candy, such as Kit Kats, 3 Musketeers, and marshmallows have air trapped inside.  This makes them float.