Igneous: This type of rock happen when magma or lava cools down.
Sedimentary: This type of rock usually formed under water when grains of broken rocks are glued together.
Metamorphic: This type of rock have been Igneous rocks and sedimentary rocks before but changed by temperature and pressure.
2. What rock did you find the most interesting? why?
In my opinion is metamorphic rocks because it have different colors of each layers that make this type of rocks look so cool.
3. what are grains in the rocks? can you show me?
Grains is the texture ( look and feel ) of the rock that made by the particles.
4. What are the crystals in the rocks? can you show me?
Crystals in the rocks is interlocking crystals which are held together strongly and make the rock hard.