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The Three Different Types of Rocks:

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All rocks are all made of minerals. As a matter of fact, rocks are made up of 2 ... The Taj Mahal in India was built of all marble. Types of Metamorphic Rocks ... – PowerPoint PPT presentation

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Title: The Three Different Types of Rocks:


1
The Three Different Types of Rocks
  • Igneous
  • Metamorphic
  • Sedimentary

2
Where Do Rocks Come From?
  • Where do you see rocks?
  • Mountains
  • Canyons
  • Riverbeds
  • All rocks are all made of minerals.
  • As a matter of fact, rocks are made up of 2 or
    more minerals.

3
The Rock Cycle
  • The rock cycle is an ongoing process that never
    stops
  • There are three different types of rocks
    Igneous, Metamorphic, and Sedimentary
  • With melting, heat/pressure, and
    weathering/erosion rocks change into different
    types of rocks
  • Rocks are always changing

4
The Rock Cycle (Cont.)
5
Igneous Rocks
  • The word Igneous comes from the Latin word Ignis,
    which means Fire.
  • Igneous Rocks come from the magma inside of a
    volcano
  • There are two types of igneous rocks
  • Extrusive
  • Intrusive

6
Igneous Rocks (Cont.)
  • Extrusive igneous rocks are formed when a volcano
    erupts
  • The magma will spill all over the surface and
    cool, this is an extrusive igneous rock
  • An intrusive igneous rock is formed when magma
    doesnt reach the surface
  • Instead, it forces its way into cracks and spaces
    between other rocks already inside the Earth and
    turns solid before ever reaching the surface
  • Magma that never makes it to the surface turns
    solid slowly,  because it takes it a long time to
    cool inside the hot Earth

7
Types of Igneous Rocks
  • Some examples of igneous rocks are obsidian,
    pumice, scoria, and granite.

8
Metamorphic Rocks
  • Metamorphism means to change
  • Normally when we think of metamorphism, we think
    of caterpillars changing into butterflies
  • Through heat and pressure an igneous rock turns
    into a metamorphic rock

9
Metamorphic Rocks (Cont.)
  • Marble is a type of metamorphic rock
  • It is formed limestone, which is an igneous rock
  • The Taj Mahal in India was built of all marble

10
Types of Metamorphic Rocks
  • Some other examples of metamorphic rocks are
    schist and gneiss.

11
Sedimentary Rocks
  • Sedimentary rocks can be formed from many
    different ways
  • Sedimentary rocks are worn down by wind and rain
    and are washed downstream where they settle at
    the bottom of rivers, lakes and oceans.
  • Eventually, with the pressure of everything above
    the sediments a sedimentary rock is formed!
  • Some of the ways that sedimentary rocks come from
    are
  • Layers of other rocks
  • Dead animals/plants
  • Sand

12
Types of Sedimentary Rocks
  • Some types of sedimentary rocks are gypsum,
    conglomerate, shale, sandstone, and limestone.

13
Summary
  • The three different rocks are igneous,
    sedimentary, and metamorphic
  • There are two types of igneous rocks intrusive
    and extrusive
  • Igneous rocks come from the magma inside of
    volcanoes
  • Metamorphic rocks change with heat and pressure
  • Sedimentary rocks are formed from layers of other
    rocks (at the bottom of lakes/rivers/oceans),
    dead animals/plants, or sand.

14
Works Cited
  • http//www.promotega.org/ksu00006/types.htm
  • http//earthnet-geonet.ca/images/glossary/magma.jp
    g
  • http//geology.csupomona.edu/alert/metamorphic/met
    arxs.htm
  • http//csmres.jmu.edu/geollab/fichter/SedRx/SimpMo
    dl.html
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