Answer:

1. This black mineral is composed of iron oxide, so magnets are able to pick it up. Because magnetite is also very heavy, when the wind blows, the lighter weight sand is blown away, leaving magnetite behind in patches

2. But in fact, the sand is anything but dirty and is made up of a really cool iron ore derivative called magnetite. If you hold a magnet over the sand, the tiny bits stick to it. The sand particles themselves become magnetic and they then attract more sand and you can conduct all sorts of fun science experiments.

3. This is done by passing the magnet over the mixture when it will pick the magnetic substance out of the mixture.

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