FC: Planet Earth
1: Rocks | An igneous rock | The most important things about rocks is that there are many different types of rocks. First of all there is igneous. The word igneous means fire. Igneous rocks are made out of magma that cools down into a solid. Another type of rock is sedimentary. Sedimentary rocks are made of different sediments, for example sand, silt, and mud. When all three of these sediments get pushed together under a river, sedimentary rocks are formed. The last type of rock is metamorphic. Through heat and pressure both igneous and sedimentary rocks can become metamorphic rocks. Another important fact about rocks and minerals are different. Rocks are made up of many different minerals but the most important thing about rocks is that there are many different types of rocks.
3: The most important things about minerals is that they must be a solid and have crystal features. Minerals are the most fashionable things nature has. Diamonds are minerals. Diamonds are also the hardest minerals known. You can tell how hard a mineral is by using Mohs scale of hardness. This scale goes from 1-10. If you can scratch it with your finger nail it would be a 1-2. If you can scratch it with a penny it would be a 3-5. If you can scratch glass with it then it would be a 6-7. If you can scratch a steel file with it then it would be a 7-9. Lastly if you can scratch a quartz with it then it would be a 9-10. 10 being a diamond but the most important thing about minerals is that they must be a solid and have crystal features.
4: The most important thing about the rock cycle is that it us continuous. When magma is cooled it becomes