Monday 25 March 2024

Modelling the flow of seawater of different densities through straits

'Exploring current flows through straits; testing the L. F. Marsili model of Bosphorus currents (1680)'.

This activity models the flow of seawater of different densities through straits, addressing several concepts within Earth sciences (concentration, density, diffusion) by means of modelling.

Related activities can be found in our Oceanography category.

Monday 18 March 2024

'Ocean acidification – The other carbon dioxide problem

The ELI team is now publishing three more activities which will be useful when teaching climate change. The first is: 'Ocean acidification – The other CO2 problem; see how acidified water affects calcareous marine organisms'.


A demonstration, involving blowing into neutral water to produce a weak acid. Powdered seashells are added and react with the acid, as a quick-acting laboratory example of how an acidifying ocean affects the life of many marine organisms.

Other related activities can be found in 'Climate change' in the 'Resources and Environment' category.

Monday 11 March 2024

Investigation into scratches on rocks caused by ice

'Ice-thickness from scratch: visualising past processes by calculation
Modelling glacial striation-formation by calculation thinking through the assumptions'.

This ELI involves a field simulation of the scratching of striations on bedrock by the debris frozen into an ice sheet, used to approximately calculate the thickness of the ice sheet and to discuss the assumptions made. The activity has been devised to enable pupils to gain a deeper understanding of the glacial processes which erode bedrock surfaces.

Related activities can be found in 'Sedimentary processes' in the Earth energy/processes category.

Monday 4 March 2024

Investigating and understanding spectacular landforms

The new ELI today is another in our very popular 'Picturing . . .' series - 'Picturing Landforms -1; visualise and draw landforms from a verbal description'.

Pupils learn to describe spectacular and popular landforms sufficiently accurately that they can be drawn by someone else. This can lead to an in-depth understanding of the particular landform.

Other activities in the series can be seen in the 'Picturing . . .' table.