Shooting Volcano

You will need:

  • 2 liquid dishwashing detergent bottles, one with cap
  • Tablespoon
  • Red food coloring
  • Vinegar
  • Baking soda
  • Papier-mache
  • Stiff cardboard or piece of wood
  • Masking tape
  • Brown and black paint
  • Paintbrush
  • Spray varnish
  • White glue
  • Funnel

A fiery, lava-spilling volcano is one of the most beutiful and terrifying sights in nature, and scientists who visit active volcanoes sometimes find themselves in great danger. This volcano model will allow you to sample some of the magic of volcanoes-safety at home.

Part-1 : Shooting-Volcano Construction

Procedure :

  1. Fill one of the bottles three-fourth full of vinegar. Use a funnel if necessary. Add red food coloring, and put the cap on the bottle. Lable the bottle "lava"
  2. Place the second bottle in the center of the cardboard or wood, attaching it with a little white glue.
  3. Tear the masking tape into strips, and attach the strips so that you make a kind of tent around the bottle.
  4. Make papier-mache by mixing flour and water in a bowl into a thick paste. Dip newspaper strips into the paste, and cover the tent you made around the bottle with the paste-coated newspaper. Built a little papier-mache up around the lip of the bottle so that you form a crater.
  5. Allow your volcano model to dry. Paint it brown and black to look like a mountain, and coat it with spray varnish.

Part-2 : Shooting Volcano Eruption

Procedure :

Remove the cap of the "lava" bottle, and carefully pour the "lava" into the volcano bottle, using a funnel if necessary.

Quickly add 4 tablespoons (60 ml) of baking soda.

Stand back and watch your volcano erupt.

Result :

The alkaline baking soda reacts with the acid vinegar to produce carbon-dioxide foam. As the foam rises to the narrowing top of the jar, it gains momentum and shoots out to fill the crater of the volcano.

Explanation :

The procedure inside a volcano can either result in a tremendous explosion or in plumes of lava that shoot far out into the air. The behavior of the foam in your miniature volcano simulated the pressure of ejecting lava.

Display Tip :

It's better to take photographs of your erupting volcano rather than to demonstrate it in your booth. You should certainly display your impressive model, however.

Did You Know?

The pressure of molten-lava gases that builds up inside a volcano can equal the force of several atomic explosions.

Millions years ago, a volcano in the northwestern United States blew the top off an entire mountain. The result was a gigantic crater, called a caldera, that gradually filled up with water. Today, the extinct volcano and transformed mountain is known as Crater Lake. In the state of Oregon, Crater Lake attracts thousands of tourist each year. Crater Lake is over 5 miles across. It is one of the deepest lakes in the world and one of the highest, too

Source : Science Fair Project by Glen Vecchione