Monday, 25 April 2016

Geological time-line - evolution of life on Earth

The new ELI published today is 'The toilet roll of time; make a geological timeline to take home'.

This activity has been devised to address the common lack of knowledge about geological time. Research has shown that many people have no idea of the great length of geological time nor of the order of the key events during the geological history of the Earth.
Click here for a video clip to accompany the activity.
Many more activities related to the evolution of life on Earth can be found on the website.

Monday, 11 April 2016

Questions to ask about faults at any rock face

Today's new ELI is 'Questions for any rock face 8: faults; what questions about faults might be asked at any rock exposure?
This activity suggests questions to help pupils to understand faults seen in field exposures, and the forces that caused them.
At the end of this ELI pupils can:-
- describe the differences between faults and other kinds of fracture;
- distinguish between normal and reverse faults in the field;
- explain how the type of faulting is linked to compressional, tensional or shear forces.
Many more related activities about faults can be found on our website.

Monday, 4 April 2016

Which way did the river flow? - Sedimentary structures - imbrication

Sedimentary rocks often contain clues about their origins. Sediments which were deposited by fast-flowing currents in rivers or on beaches may
demonstrate imbrication, where rock fragments were pushed in one direction by the current so that they overlap each other. Ask your pupils to simulate this process with dominoes by trying the ELI 'Sedimentary structures - imbrication; which way did the river flow?'

Many more activities about the clues to environment given by sedimentary rocks may be found under 'sedimentary structures' in the index or by using the search engine on the website.

Monday, 28 March 2016

Questions to ask at any rock face about tilted and folded rocks

Our fieldwork series continues with 'Questions for any rock face 7: tilted or folded rocks; what questions about tilting and folding might be asked at any rock exposure?'
Bedded sediments that were originally laid down horizontally, often became tilted as part of the limbs of larger folds; sometimes the folds themselves can be seen in the rock face. Take the pupils to some tilted or folded rocks and ask them the questions provided. They will then be able to:-
- explain how tilted rocks form parts of larger-scale folds;
- work out the directions of the stresses which caused the deformation of the tilted and folded rocks;
- explain how hard rocks may have been deformed in the geological past;
- explain how rock deformation results from enormous stresses – stresses only possible from plate collision.
Lots more activities related to tilted and folded rocks may be found on the ELI website.

Monday, 21 March 2016

Ice power - physical weathering

'Ice power; freezing water in a syringe to measure expansion'.

This activity may be used in either science or geography lessons on weathering. It can also be used in discussions of molecular theory and changes of state. For the most accurate measurements use pure (distilled or deionised) water at as near to 4 degrees C as possible.
Many more activities associated with weathering can be found by using the search engine or index on our website.

Monday, 14 March 2016

New ELI - Questions to ask about fossils when looking at rocks

The new ELI just published is 'Questions to ask at any rock face 6: fossils. What questions about fossils might be asked at any rock exposure?'
- What happened to these animals/plants just after they died?
- Were they buried where they were or moved around, sorted out and broken up?
- As they were being buried, what might they have looked like, smelled like?
- After they were buried, how did they change?
- Why are some types of organism much more commonly fossilised than others?
- What can fossils tell us about a deposit?
Other related activities can be found on the home page of our website.