Recent snow and ice has caused more potholes to form on the country's roads forcing councils to spend more time and money on fixing them.
Potholes are formed by water penetrating the asphalt surface of a road through cracks caused by traffic. When temperatures plunge, the water freezes, expands and causes the surface to rupture. When the ice melts, it leaves a void below the surface, which caves in under the stress of vehicles and eventually forms a pothole.
Children will investigate how rocks react differently when in water. They will do this by testing the permeability of a selection of rocks.
- that some rocks are more permeable than others
Children will learn:
- that we can test and measure the differences in rocks
These resources were initially developed in partnership with the Centre for Science Education, Sheffield Hallam University.