Rocks Igneous
Now, what is a rock? Well, a rock forms when minerals form together in different ways. Like for an example Igneous rocks. Igneous rocks form when fast cooling lava dries up and they come out of the Earth. There are two ways igneous rocks form. The first way is called Extrusive and means that the mineral will form outside the Earth. The second way is called Intrusive and that means that the rock will form in side the Earth. |
Metamorphic
Another type of rock is a metamorphic rock. Metamorphic rocks are the second type of rock that you'll be learning about on this page. This type of rocks form from existing rock types. Just like all rocks, texture and the assemblymen of chemicals and minerals classify metamorphic rocks. Most Metamorphic rocks are formed under the heat of 150 degrees Celsius. Now here's a fun fact, the Metamorphic rock's heat could tell scientists about how hot it is beneath the depth of our Earth's crust. Some examples of metamorphic rocks would be: Gneiss, Slate, Marble, Schist, and Quartzite.
Sedimentary
Now, the last type of rock I will be talking about is called the Sedimentary rock. These sedimentary rocks are made from sedimentary and / or chemical reaction. Water, wind, and ice move the sediments around until they settle on others sediments, creating layers until they are all packed together. When sediments squeeze together, the process of this is called "Compaction". The second way these Sedimentary rocks form is that they will be held tight together forcing them to form into a stone or rock. This process is called "Cementation". Sedimentary rocks can also be formed in water by changes of different chemicals.