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