Experiment Two:

***Making an Underwater Volcano***

Discussion Question:

What is a volcano?

What makes a volcano erupt?

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• Definition of Volcano: A vent in the crust of the earth or another planet or a moon from which usually molten or hot rock and steam issue

• Definition of Magma: Melted rock

A volcano begins as magma rises from deep inside the earth toward the surface. As the gas-filled magma rises, it melts gaps in the surrounding rock and forms a large chamber. Pressure from the solid rock around it forces the magma up to the surface through the conduit (channel) in a weakened part of the rock. The gas and melted rock blast out an opening called the central vent.

The erupted materials gradually pile up around the vent, forming a volcano. A bowl-like crater generally forms at the top of the volcano. The vent lies at the bottom of the crater.

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Materials needed:
-Scissors, narrow-necked small bottle, hot and cold water,
red food coloring, string, and a large glass jar.
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Step One: Fill a large jar with cold water.


Step Two: Cut a long piece of string and tie around each side of the bottle to make a loop.

Step Three: Fill the little jar with extremely hot water. Pour a few drops of red food coloring into the jar directly afterward.


Step Four: Hold the bottle by the loop of string. Lower it gently into the jar of cold water.
The hot water rises from the small bottle like smoke from an erupting volcano!

Underwater Volcano

More Resources on Volcanoes: