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2015-12-20T17:17:33+05:30

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1. Sedimentary rock- composed of different sediments stuck together to form a rock. It may include stones, pebbles, etc. Because it's mostly made of these particles, this kind of rock easily breaks. 

2. Metamorphic rock- this one has undergone metamorphosis due to the pressure and heat under the earth. It then gets layers and may form a crystal.

3. Igneous rock- this rock is formed from cooled and hardened magma
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