Take some soil and put it into a beaker containing water. The water should be at least five times the amount of soil taken. Stir the soil and water vigorously and allow the soil to settle down. Observe after some time.
Now answer the following questions :
Is the soil at the bottom of the beaker homogenous or have layers formed ?

Explanation

Soil is not homogenous, but it forms layers due to particles of various size.