Monday 24 April 2023

Geohazard - sink holes

Continuing our geohazards theme - 'Sink hole! Demonstrate sink hole processes in action'


Video (Catalan language)

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.

Our Natural Hazards category lists many more Earthlearningideas.

Monday 17 April 2023

Forecast earthquakes by monitoring movement on faults

The new ELI today is 'Slip-sliding away; how does monitoring fault creep help to forecast earthquakes?'

This earthlearningidea is a simulation and case study of a monitoring survey used to monitor the slow creep along fault planes that leads to the build-up of strain prior to its release in an earthquake.

Go to our Natural hazards category to find other activities about earthquakes.

Monday 10 April 2023

How you can use density to separate different materials

Video: - ' Jigging; using density to separate different materials'.

This is a simple practical activity used to separate minerals of different density from each other. It is a small scale version of a method which was used for centuries.

More Earthlearningideas about Minerals can be found here.

Monday 3 April 2023

Explaining crystal size in igneous and metamorphic rocks

The new ELI today is 'Building silicates; simulating crystal size during the cooling of magma and during recrystallisation in solid rock'.


This Earthlearningidea is a consolidation exercise to show how cooling/recrystallisation rates might explain crystal size in igneous and metamorphic rocks.

Related activities can be found in the categories 'Igneous processes' and 'Metamorphic processes'.