1. Unit 4 Earth – Systems, Structures, and Processes Objective 6.E.2.3

2. The Rock Cycle Sedimentary Rock- type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together.  A rock that is created by layers of rock piling up on top of one another will become a sedimentary rock.

3. The Rock Cycle Sedimentary Rocks: Clastic: formed when rock and mineral fragments are compacted and cemented together Fine grained or Coarse grained Chemical: formed when minerals and dissolved and crystallize within a solution (like water) Organic: rocks formed from the once-living organisms

4. The Rock Cycle Igneous Rock- type of rock that forms from cooling of molten rock at or below the surface.  A rock that melts to form magma will next become an igneous rock.

5. Igneous Rock

6. The Rock Cycle Metamorphic Rock- type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions.  A rock that is heated and pressed is on its way to becoming a metamorphic rock.

7. The Rock Cycle Extrusive Rock: igneous rock that forms from lava on Earth’s surface. Intrusive Rock: igneous rock that forms when magma hardens beneath Earth’s surface.

8. The Rock Cycle

10. The Rock Cycle (Step by Step) Step 1: An igneous rock turns to sediment by erosion. Step 2: Layers build up to become sedimentary rock. Step 3: The sedimentary rock is buried by more sediment. Step 4: Heat and pressure slowly change it into a metamorphic rock. Step 5: The metamorphic rock is forced into the mantle and melts to form magma. Step 6: The magma erupts to form igneous again.