Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

Geology Science Fair Project

Exploding Volcano Model

Exploding Volcano Model | Science Fair Projects | STEM Projects
Let's explore how volcanoes erupt! We'll use air pressure to propel tephra (sand) into the air. A fan will disperse the tephra downwind where it accumulates to form a cinder cone.


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

Method & Materials

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.

Why do this project?

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.

Also Consider

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."

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related video

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!!
Share this Science Project:

Related Science Fair Project Ideas

Soil Quality and Management
How does soil management affect soil quality? Let's find out by comparing soil from a forest, a field with conventional farming, and a field with compost added.
Build a Model Earthquake
Create a mini-earthquake with a heavy object, elastic cord, and vibration sensor!
Causes of Landslides
Landslides can cause serious damage to aquatic ecosystems. Learn how to identify and measure landslides in the Walla Walla River Watershed and the effects on salmonid health and habitat.
Share this Science Project: