Rocks

There are three groups of rocks: Sedimentary,Igneous and Metamorphic rocks.

Sedimentary rocks

Sedimentary rocks are made of sediments. These are made of small pieces of rock. The bit of rocks turn into pebbles, gravel, sand and clay.

Igneous rocks

• Igneous rocks are the oldest kind of rock they are formed deep inside the earth.

• The igneous rocks are really shiny.

Metamorphic rocks

Metamorphic rocks have been changed over time by extreme pressure and heat. Metamorphic rocks can be formed by pressure deep under the earths surface from the extreme heat caused by magma or by intense collisions and friction of tectonic plates.

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Conclusion.

I really enjoyed learning about rocks. My favourite rock is marble I love it because I live in the marble city a.k.a. Kilkenny. I hope you know more about rocks now.

The EndBy Brian Tierney. 3rd Class