Download Unit 4 Objective 6.E.2.3

Unit 4
Earth – Systems, Structures, and
Processes
Objective 6.E.2.3
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.
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
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.
Igneous Rock
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.
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.
The Rock Cycle
The Rock Cycle
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.