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Rocks and The Rock Cycle

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Rocks and The Rock Cycle Rock is a solid material made up of one or more minerals or other substances, including the remains of once-living things. – PowerPoint PPT presentation

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Title: Rocks and The Rock Cycle


1
Rocks and The Rock Cycle
  • Rock is a solid material made up of one or more
    minerals or other substances, including the
    remains of once-living things.

2
Types of Rocks
  • Igneous Rock
  • Sedimentary Rock
  • Metamorphic Rock

3
Igneous Rock
  • Igneous rock forms when magma or lava cools and
    hardens.

4
Igneous Intrusive Rocks are formed from magma
beneath the surface.
  • gabbo
  • granite
  • pegmatite
  • diorite

5
Igneous Extrusive Rocks are formed from lava on
the surface
  • andesite
  • pumice
  • scoria
  • obsidian

6
Sedimentary Rock
  • Sedimentary rock forms when particles of rock and
    other materials are pressed and stuck together
  • Erosion moves sediment from place to place on
    Earths surface.
  • Sediment is laid down in a process called
    deposition.
  • Slowly thick layers of sediment build up and the
    weight of the layers above presses down on the
    layers below. The process is call compaction,
    squeezes the layers of sediment together.
  • Another process, called cementation, glues the
    sediment together.

7
Three major types of sedimentary rocks
  • 1. Clastic rocks are pieces of rocks that have
    been pressed and stuck together.
  • siltstone
  • conglomerate

8
  • Organic rock are formed from the remains of
    plants and animals.
  • limestone
  • coal

9
  • 3. Chemical Rock areformed when dissolved
    minerals come out of solutions and form crystals.
  • iron ore
  • rock salt

10
Metamorphic Rock
  • Heat and great pressure deep beneath Earths
    surface can change rock to metamorphic rock
  • Sometimes heat from a volcano causes nearby rock
    to become metamorphic rock

11
Metamorphic Rocks

  • granite becomes
    gneiss

12
The Rock Cycle
  • Forces inside Earth and the surface produce a
    rock cycle that builds, destroys, and changes the
    rocks in the crust.
  • The rock cycle is a series of processes on and
    beneath Earths surface that slowly change rocks
    from one kind to another.

13
Igneous, sedimentary, and metamorphic rocks
change continuously through the rock cycle
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