Today in class we took notes on rocks and minerals. We had to answer some questions that our teacher gave us, some of the questions were how are rocks created, what types of rocks are there, the rock cycle and similar questions. I learned that there are 3 types of rocks: sedimentary, metamorphic and igneous. Sedimentary rocks are formed when sediments are deposited in the layer of the lake and after some time they compress together and form a rock. Metamorphic are formed by the transformation of pre-existing rocks. Igneous forms when lava cools and solids. We also learned about the rock cycle which is simply constant changing of different types of rocks over a long period of time. We also learned about minerals and how to identify them by asking our selves these questions is it.. solid, naturally occurring, inorganic, fixed composition, crystal form? We also found 3 interesting facts about rocks and minerals and the facts i found that were really interesting were: that quartz is the most common mineral and that diamonds are the hardest substance known to man. I really enjoyed learning knew stuff.
What's the third interesting fact?
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