Monday, 17 July 2017

Experience an earthquake in your classroom!

This week's new ELI is 'An earthquake in your classroom; a classroom earthquake intensity scale.'

This activity helps pupils to visualise what experiencing an earthquake of different intensities might be like. Dramatic re-enactment of this classroom earthquake intensity scale can make fine school drama performances or add to school open days.
It is worth repeating the old dictum, “Earthquakes don’t kill people; buildings do.”
Many more activities about earthquakes and their causes can be found on the website.

Monday, 10 July 2017

Modelling how rock cliffs and slopes collapse

'Failing slopes; modelling how rock cliffs and slopes can collapse'  Rocks with horizontal bedding tend to be fairly stable, but when they dip at an angle they are less stable, particularly if they have vertical fractures or joints. The type of collapse usually depends upon the rock type and thickness of the beds.

The activity could be used in a lesson on slope failure itself, or as an application of the physics of friction. Results obtained from an actual investigation are given in the activity.
Many more activities can be found on our website.

Monday, 3 July 2017

Rising mountains can reveal hidden secrets

The new ELI today is “Hooray and up she rises!” How a rising mountain chain can reveal its hidden secrets.

This activity is modelling how erosion of the top of a mountain range is accompanied by isostatic uplift, eventually exposing rocks, once hidden deep below. The activity is aimed at reinforcing the concept of isostasy (a state of balance in the Earth’s outer layers). It is also intended to show hat many igneous rocks become exposed at the Earth’s surface long after they have become solid rocks and are no longer flowing as magma.
Similar activities can be found on the website.

Monday, 26 June 2017

Modelling ancient and modern magnetic fields

'Human magnets! Modelling ancient and modern magnetic fields, using your pupils'. In this Earthlearningidea, pupils use their own bodies to model the magnetisation induced in magnetite mineral particles by the Earth’s field of today: also the magnetic evidence within ancient rocks for ‘continental drift’.

The activity can be used to aid the understanding of remanent magnetisation in rocks. This in turn provides evidence of past magnetic fields of the Earth and is of great value in demonstrating the former latitudes of the continents, before their plate tectonic movement.

Many more activities about magnetism can be found on the website.

Tuesday, 20 June 2017

Ammonites: the ups and downs

The new ELI published today is 'The ups and downs of ammonites; how did they adjust their position in the sea?
The demonstration shows how some animals which are buoyant in water can change their depth in the sea. Explain that ammonites had a coiled shell, but that the soft body only lived in part of the outermost coil. Inside the rest of the shell, the space was filled with gas, which made the animal buoyant.
Demonstrate this, using a boiling tube full of air with a bung to represent the shell of the ammonite. The air-filled tube represents the gas- filled inner coils of the ammonite. The bung represents the living parts of the animal, which can move towards the neck of the tube or retract back into it.
Many more activities about bringing fossils back to life can be found in the Evolution of Life category on our website.

Monday, 12 June 2017

Hotspots - modelling the movement of a plate over a hotspot

Have you tried this ELI? 'Hotspots; modelling the movement of a plate across the globe'
After the activity pupils can understand the motion of one object (the card) relative to another (a point source of heat – a candle) and then be able to relate the card and candle model to the movement of a plate relative to a fixed source of heat in the mantle below. They can also use evidence of volcanic activity in the Pacific Ocean to deduce the on-going motion of the Pacific plate.
Many more activities about plate tectonics can be found on our website.

Monday, 5 June 2017

Environment differences between today and when the rocks formed

The new ELI today is 'Now and then – spotting the difference; how did the conditions differ between today and when the rock was formed?'

Between now (today) and then (when the rock was formed) how have these things changed?:
- temperature
- orientation
- humidity
- altitude
- visibility
- latitude
- pressure
- age
- life, invertebrates and vertebrates
This is a thought experiment, attempting to compare various aspects of the environment when the rock was formed, with conditions today.
Many more activities about past environments can be found on our website.