1 / 5

Rocks

Rocks. Rocks are defined as a mixture of one or more minerals and organic matter There are three types of rocks: Igneous Sedimentary Metamorphic. Igneous Rocks. Form when magma cools Found near volcanic activity

peyton
Download Presentation

Rocks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Rocks • Rocks are defined as a mixture of one or more minerals and organic matter • There are three types of rocks: • Igneous • Sedimentary • Metamorphic

  2. Igneous Rocks • Form when magma cools • Found near volcanic activity • Composition of igneous rocks aredetermined by what minerals they are made from • Texture is determined by how fast the magma cools • Magma that cools quickly forms smooth grained rocks (smooth to touch) • Magma that cools slowly forms course grained rocks (rough to touch)

  3. Igneous Rock Formations • Intrusive Igneous Rocks • Form below the earth surface or inside the Earth • Have a course grained texture because the magma cools slowly • Extrusive Igneous Rocks • Forms on the Earth’s surface • Have a smooth texture because the magma cools quickly

  4. Sedimentary Rocks • Formed from the sediments made during the erosion of other rocks • Sediments settle in low places, usually near or under bodies of water • Over time the sediments form layers that are compacted together and form rocks • Sedimentary Rocks are almost always found in strata or layers

  5. Metamorphic Rock • Form deep in the earth when heat and or pressure change rocks into new and different types of rocks • Contact metamorphism takes when rocks are heated by nearby magma • Heat causes the minerals in the rocks to change • Regional Metamorphism occurs deep in the earth where pressures build up and are able to create a chemical change in rocks

More Related