Why Can a Magnet Pull Black Grains Out of Beach Sand?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why can a magnet pull black grains out of beach sand?

The Big Idea

Walk along some beaches and you might spot dark streaks in the sand. Those streaks hide tiny black grains that a magnet can pull right out. Let's find out what they are!

Tiny Black Grains

Step one: tiny black grains. Some sand contains tiny black grains of magnetite, a mineral rich in iron. Because it holds so much iron, magnetite is magnetic.

Broken Rocks

Step two: broken rocks. The grains come from rocks such as volcanic basalt. Wind and waves have slowly broken those rocks down into sand over a very long time.

A Magnet Sweeps

Step three: a magnet sweeps. A magnet pulls the magnetic grains out of the lighter sand. Dark streaks on beaches and riverbanks are often the best places to find them.

A Closer Look

Let's take a closer look! Most of the sand is light. The black grains are magnetite. A magnet pulls those grains out. They come from broken volcanic rock.

Quick Facts

Quick facts! Magnetite was one of the first magnetic materials people ever discovered. The grains often come from volcanic rock. Dark streaks on beaches are good places to look. Waves and wind do the grinding.

Think Like a Scientist

Now, think like a scientist! Put a magnet inside a zip bag. Wave it over dry sand. Turn the bag inside out, or ask a grown-up to help. Look closely at what it collected. Then explain what you learned to a friend.

Outro

Black magnetite grains in beach sand are magnetic, so a magnet can pull them out. Science is amazing! Keep wondering and keep exploring! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!