Materials:

• A large clear container filled almost to the top with water (or a glass filled half full with water)
• Chunk of ice or ice cubes

Procedure: Place the ice into the container of water.
Observe how much of the "iceberg" is above and below the surface of the water.

Conclusion: About 1/8 of the iceberg remains above water. About 7/8 of an iceberg is below the surface making it dangerous to ships.

Did you know? Glaciers are made of ice formed from snow that fell hundreds of years ago. These huge mountains of ice move slowly toward the sea. When the ice reaches the sea, it forms shelves of ice over the water. Sometimes huge pieces of ice break off into the sea to become icebergs. It may take two or three years for even small icebergs to melt. Icebergs larger than Delaware and France have been found.