Transcript Rock Cycle - Frost Middle School

 Naturally
formed solid that is usually
made up of one or more minerals
 Minerals combine to form most rocks
 Minerals – have a definite chemical
makeup
 Rocks do not have a crystal structure
 Limestone has only one mineral
 Obsidian and Coal have no minerals
 Earth
is almost all rock
 Used for many things
 Monuments and sculptures made of
 We study to learn how things change
 Rocks
change over thousands/millions of
years
 Never stops – no start or end
 Does not have to go in an order
 Forms
when molten rock cools and
becomes solid
 Can form within Earth or on surface
 Rocks formed deep underground can
come to surface
 Forms
when pieces of rocks or other
plants/loose material press or cemented
together
 New minerals can form in spaces where
not cemented together
 Sediment gets carried by water or wind
 Water evaporates leaves behind minerals
that dissolve in water
 Forms
when heat and/or pressure
changes older rocks
 Structure of rocks change – new minerals
created
 Can raise to surface over time
 All
three kinds can be found here
 95% of entire crust Igneous and
Metamorphic
 75% of the surface is Sedimentary
 Distribution due to rock cycle