Sink holes have been in the news in the UK over the last few weeks. Our ELI about this topic is 'Sink hole! Demonstrate sink hole processes in action'.
Sink holes commonly form over limestone bedrock, but also develop where the underlying materials are even more soluble, such as rock salt and gypsum deposits. This classroom activity models the dissolving of underground materials and the impacts this can have at the surface.
Other activities can be found in our natural hazards category.
