Monday, 29 December 2025

Using rock evidence to colour the geological past

"What colour was the world in the past? - using rock evidence and ‘the present is the key to the past’ to colour the geological world."


This ELI involves a discussion, using the colours of unweathered surface rocks and ‘the present is the key to the past’ to give a coloured picture of past geological worlds.

Related activities can be found in our 'Environment' category.

Monday, 22 December 2025

Monday, 15 December 2025

Monday, 8 December 2025

Monday, 1 December 2025

How did ammonites try to escape their predators?

And now for something completely different . . . 'The ups and downs of ammonites; how did ammonites adjust their position in the sea'.

This activity demonstrates how some animals which are buoyant in water can change their depth in the sea.

Related activities about fossils can be found in our Evolution of Life category - Fossils (mostly invertebrates).

Monday, 24 November 2025

Identifying rocks

This is the second ELI about identifying rocks in an outdoor collection - 'A forgotten rock garden - 2; help a geologist identify a treasured outdoor collection'.

This activity involves matching a set of photographs to their descriptions and locating them on an overall scene. It could form a useful revision activity, once pupils have acquired experience of a range of rocks. The answers are provided in the text.

Related activities can be found in 'Rocks' in our Earth Materials category.

Monday, 17 November 2025

How do minerals like tin and lead form? - a demonstration of hydrothermal mineralisation?

How do hydrothermal minerals form? Our ELI today gives the answer - "Interactive hydrothermal mineralisation: ‘the rock with the hole’ hydrothermal mineralisation demo".


This ELI is a demonstration of how hydrothermal fluids flow through rocks, presented in a way to interact with pupils.

Other activities related to minerals can be found in our Earth Materials, Minerals category.