The hypothesis is that air pressure can be used to simulate a volcanic eruption.

You will assemble the apparatus as shown in the diagram, feed sand down to the "eruption" using the funnel, and use a fan to blow air across the sand as it leaves the "vent."

You will need sand or cinder, pressurized air, a plastic funnel, plastic tubing, a plastic T-joint, and a white sheet or white cardboard.

We were surprised by the results! After the sand was ejected it made beautiful cones, much like cinder cones or tuff rings. The cone even had a central crater.

This science project is interesting and unique because it uses air pressure to simulate a volcanic eruption and demonstrates how tephra is dispersed downwind to form a cinder cone.

Experiment variations to consider include using a can of compressed air instead of an air jet, and using a fan to blow air across the sand as it leaves the "vent."

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!