Not all soils are the same. If you dig into the ground in different places you wil find different kinds of soil. Some soils are light and crumbly; some are gritty; some are heavy and sticky. If you dig down deep enough beneath the soil you will eventually reach rock. Over a very long time this rock has been broken down to form the soil that now lies on top of it. So the type of soil you have depends on the type of rock it has come from.
This worksheet gives you an opportunity to find out what you know about different types of soil.