2.1 Meanings :
1. Concentric – denoting circles .
2. Intrusive rocks – formed by intrusion .
3. Extrusive – denoting rock is been extruded at the earth’s surface as lava .
4. Composition – mixture is made up .
5. Mantle – the region of the earth’s interior between the crust and the core .
6. Beneath – at a lower level .
7. Magma – hot fluid .
8. Igneous rock – form when hot .
9. Sediments – matter that settles to the bottom of a liquid .
10. Fossil – the remains .
11. Transformation – a marked change in form .