Rocks and Minerals
 By Sean Stanton
Types of Rocks
 There are 3 types of rocks
 Igneous
 Sedimentary
 Metamorphic
Igneous Rocks
 Igneous rocks are formed by hot molten
material that cool’s and hardens.
 The word igneous means fire made.
 This m molten material may cool above or
under the earths surface.
 obsidian
Sedimentary Rocks
 Sedimentary rocks are formed by layers that
tell age over time.
 an example of a sedimentary rock is
sandstone.
 To see a volcano in action click here.
Metamorphic rocks
 The word metamorphic means changed in
form.
 Metamorphic rocks are formed by heat
and/or pressure.
 An example of a metamorphic rock is marble.
 Marble is made from limestone heated and
pressurized.
The Rock cycle
 The rock cycle is a never ending process
where rocks are changed.
 Without the rock cycle there would not be
any rocks.
Minerals
 Minerals are what rocks are made of.
 You can tell a mineral by luster,color,hardness
and streak plate
 An example of a mineral is quartz
Vocabulary
 Minerals-a naturally occurring substance ,neither a
plant nor animal.
 Igneous rocks –fire made rock formed from melted
rock material .
 Sedimentary rocks-rocks formed from bits or layers
of rocks segmented together.
 Relative age-the age of something compared to the
age of another thing.
 Rock cycle-a never ending process in witch rocks are
changed.
Metamorphic rock- a rock formed by heat and/or
pressure.
CREDITS
 SCIENCE TEXT BOOK
 COPYWRITE DATE 2006
 To see the coolest teacher’s website click
here.