When magma cools slowly underground the crystals are large enough to see. Magma that erupts onto the surface is called lava. Igneous Rock is formed when a magma cools underground and crystallizes or when it erupts unto the surface of the ground, cools and crystallizes. A rock is like the car, a mineral is like the steel, or glass, or plastic. A car is made of steel, glass, and plastic. Minerals are not rocks, rocks are made of minerals. Most rocks are made from more than one mineral, but there are quite a few kinds that are made from only one mineral. Rocks are made of minerals, like quartz, calcite, feldspars, and micas. They are everywhere on earth, but often buried under soil. They are the mountains and the bottom of the ocean. Rocks are what the crust of the earth is made of. Gneiss, Marble, Quartzite, Schist, Serpentinite, Slate The Rock Identification Key - by Don Peck Rock Key Table of Contents The Rock Keyīasalt, Diabase, Diorite, Gabbro, Granite, Obsidian, Pumice, Rhyolite, Scoriaīreccia, Conglomerate, Limestone, Sandstone, Shale
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |