Why Do Cinder Cones Look Like Sand Piles?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do cinder cones look like sand piles?

The Big Idea

A cinder cone is a small, steep volcano built from bits of lava. The bits shoot up, fall back down, and pile up around the vent. It makes the same shape as a pile of sand!

Frothy Spray

Step one: frothy spray. Gassy lava shoots into the air in a fountain, breaking into frothy bits. Those bits are called cinders.

Falling Cinders

Step two: falling cinders. The cinders cool in the air and fall back down close to the vent. Over days and weeks, they build up into a hill.

Steepest Angle

Step three: the steepest angle. Loose pieces pile up until the slope is about 30 degrees, and then the extra tumbles down. Dry sand piles up the same way, so a cinder cone looks like a sand pile.

A Closer Look

Let's take a closer look! Cinders shoot out of a central vent. They are loose and light, like gravel. They stack up at a steady slope. A bowl-shaped crater often sits on top.

Quick Facts

Quick facts! Cinder cones can form in just a few weeks. Most cinder cones are small, often less than 300 meters tall. The Tseax Cone in British Columbia erupted about 250 years ago. Cinders are loose, so never climb steep volcano slopes by yourself.

Think Like a Scientist

Now, think like a scientist! Pour dry rice from a cup onto a tray to make a cone. Use a protractor to measure the slope. Pour more rice. Does the angle change?

Outro

Cinder cones look like sand piles because loose pieces stack at a steady angle. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!