What is soil?
This video will give you an introduction (she does talk very fast though!)
Try this: If you are able to, get a clear jar with a tight fitting lid.
Fill it about a third of the way full of soil (any soil will do) and then fill the jar to about ¾ full (see those fractions will come in handy now!) with water.
Shake the jar really hard and then leave it to settle for an hour or two – or overnight.
What do you notice? Take a photo of your jar and see if you can label anything you see in it.