SOCIAL SCIENCE: ROCKS AND MINERALS

Remember the 3 layers of the Earth (lithosphere = litosfera):

The 3 layers of the Earth are: crust, mantle and core. It is very hot inside the Earth!

ROCKS CAN BE SEDIMENTARY, METAMORPHIC OR IGNEOUS:

The Earth's crust is made up of rocks. There are 3 types of rocks: sedimentary, metamorphic and igneous.

Rocks are made up of minerals. Minerals have different properties, like:
- Colour: for example, sulphur is yellow and cobalt is blue.

         
- Hardness: diamonds are hard but talc is soft

           
- Lustre: some minerals are shiny, like gold and others are dull, like graphite.

              

Here there is a game to check how much you know about minerals: http://www.oum.ox.ac.uk/thezone/minerals/define/quiz/index.htm