Isostasy: State of balance in the Earth's outer layers

Earthlearningidea has two activities which explain isostasy. The first is 'Isostasy 1: modelling the state of “balance” of the Earth’s outer layers'.

This activity establishes the principle of isostasy, using wooden blocks floating in water and in a denser medium.
The second activity is 'Isostasy 2: “Bouncing back” after the ice'

This is a demonstration of the effects on a continental land mass of an ice sheet growing and then melting.
Many more innovative activities, which teach a lot but are also fun to do can be found on our website.