|St Albans' Science Club||
In preparation for learning how caves are formed we learnt about the types of rocks today.
Although there are many types of rocks on earth and we can name lots of them, we learnt that they can all categorised as three main types:
As we only have one lunch time to learn about something you could study for years we kept it very simple. And also used food to help us understand the types.
Igneous rocks are formed when magma (molten rock deep within the earth) cools and hardens.
Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of materials. Over many hundreds of thousands of years these layers of sediments form on top of each other.
We made our own sedimentary rocks out of layers of bread, rice bubbles, chocolate chips and coconut to represent the layers.
Metamorphic rocks are formed when the original rock changes (metamorphosis) from either intense heat or pressure. We chose to change our rocks with pressure and squashed our rocks down.
And of course we got to eat our rocks at the end!!!
Here is a video to help you learn more about rocks at home.