Wednesday, 30 November 2016

Monday, 28 November 2016

Why is the Dead Sea dead?

Why is the Dead Sea dead? This is a classroom activity to measure the density of water of different salinities.


The Dead Sea in the rift valley between Jordan and Israel is the lowest point on land on the Earth’s surface. Most of the water that flows into the Dead Sea does not flow out again but is evaporated in the highly arid conditions. At the end of this ELI, pupils can:-
- describe how dissolving salt in water increases the density of the water;
- describe how a ‘floater’ can be used to measure the density of solutions.
Many more good ideas for teaching can be found on our website.

Monday, 21 November 2016

Investigating building materials around your school and local area

Today's new ELI is 'Rock around your school; investigating the building materials around your school and in your area'.


This activity can be used in science or geography lessons. It illustrates Earth science principles out of doors, often without a natural rock in sight, and engages pupils in discussions about Earth processes and products.
Many more activities are listed on our website.

Monday, 14 November 2016

The opening of the Atlantic Ocean

'Continental split - the opening of the Atlantic Ocean; modelling how the continents moved, from Pangaea to today'  This ELI is a scissors and paper activity modelling the relative positions and movements of the continents as the ocean floor spreads either side of an oceanic ridge.


This activity could be used in any science or geography lesson about sea floor spreading and Wegener’s concept of continental drift. A video clip accompanies the activity.
Many more activities about plate tectonics and continental drift can be found on our website.

Monday, 7 November 2016

Calcium carbonate misconceptions

The new ELI just published is ‘I’m pure calcium carbonate’ – the calcium carbonate question; a discussion focussed on common misconceptions about calcium carbonate.

Are limestone and chalk rocks made of pure calcium carbonate? What about the mineral calcite? This activity helps pupils to understand the likely purity of minerals and rocks.
Many activities to do with limestone and chalk landscapes, the weathering of limestones and the carbon cycle can be found on our website.

Monday, 31 October 2016

Three-dimentional magnetic field of the Earth

'Why won’t my compass work on the other side of the Equator?' This ELI helps pupils to understand the three-dimensional magnetic field of the Earth.


The Earth’s magnetic field is three dimensional in the same way as the field of any magnet. It is because of the Earth’s 3D magnetic field that the magnetic needle of a compass has to be weighted so that it floats horizontally in one hemisphere; but this means that the weight is on the wrong end of the needle for the other hemisphere, so that it doesn’t work there. The vertical component of the Earth’s magnetic field can be shown by a dip needle (constrained to rotate in a vertical plane) or a freely-rotating Magnaprobe TM.
Many more activities about the Earth's magnetism can be found on the website.

Monday, 24 October 2016

What's the difference between porosity and permeability?

Our new ELI just published is 'Does my rock hold water and will water flow through it?' This activity investigates the differences between porosity and permeability.


The activity can be used in any science or geography lesson where the ability of rocks to hold water or hydrocarbons is being discussed.
There are two activities for your pupils to try and, because they involve chocolate and LegoTM, they are very popular with children!
Related ideas about porosity and permeability can be seen on our website.