A soil scientist explains what soil is and what it is made from. Soil can be of different types and is composed of different layers. The scientist compares clay with sandy soil by adding water to samples.
- This clip is from:
- First broadcast:
- 9 October 2007
After watching the clip, children could carry out an investigation into soil permeability by timing how long it takes a certain amount of water to drain through a particular sample. Children could contrast sandy soil, to clay soil, to rocky soil, and examine samples under the microscope to look at how the particles are packed and relate this back to how quickly the water is able to flow through it. Children could consider the effects these types of soil could have in areas at risk of flooding and for farmers and crops growing in fields.