Sedimentary rocks form on or near surface of the earth'

1
Sedimentary Rock

• Sedimentary rocks form on or near surface of the
  earth.
• Rocks and minerals that are broken into small
  pieces by wind water and ice are called sediment.
• Clay, sand and mud are all sediments
• These sediments settle on the bottom of water,
  then other sediments cover them, and more
  sediments cover them and so on.

2
Sedimentary Rock

• Over hundreds of thousands of years a new rock is
  cemented together.
• Sedimentary rocks are usually layered.

3
Metamorphic Rock

• Metamorphic rocks are igneous and sedimentary
  rocks that have been changed by extreme heat and
  pressure deep within the earth.
• The high temperatures and pressures force the
  rocks to form new minerals and therefore change
  the way they look.
• For example sandstone becomes quartz, granite
  changes to form Gneiss.

4
Igneous Rock

• Igneous rocks are formed when volcanoes erupt.
• Hot magma or melted rock pushes upward and
  escapes through a hole in the earths crust.
• When magma reaches the surface of the earth it
  cools quickly and is called lava.
• Rocks formed this way are called extrusive
  igneous.

5
Igneous Rock

• Intrusive Igneous Rocks
• Other igneous rocks are formed inside the earth.
• Over millions and millions of years the magma in
  the earth cools and hardens into rock.
• We do not see these rocks until wind water and
  ice wear away the earth so we can see the rocks.
• These rocks are called Intrusive Rocks.