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The Rock Cycle
A rock is a naturally formed
solid that is usually made up
of one or more types of
minerals.
Some rocks
however can contain
no minerals such as
Obsidian and coal.
The Rock Cycle
Since the earth is
a majority of rock
there are many uses
for it such as:
The building of
houses and
skyscrapers
The Rock Cycle
The sources of metals such as
aluminum, iron, and copper
The Rock Cycle
The carving of statues and other works of
art
The Rock Cycle
A base for pavement for roads and
highways
There are many famous monuments and
structures made from rocks
The Rock Cycle
Granite blocks from the Great Wall of
China
The Rock Cycle
Limestone blocks make up the great
pyramid in Egypt
The Rock Cycle
At Mount Rushmore granite was carved
for the four U.S. presidents
The Rock Cycle
Rocks are always changing, by that
change can take thousands to millions of
years.
The rock cycle is a set of natural
processes that form, change, break down
and reform rocks
The Rock Cycle
The rock cycle never ends it goes on
continually
There are three types of rocks
Igneous Rock when molten rock cools and
becomes a solid. Igneous rock can form
on the surface or at depths of the earth
over time.
The Rock Cycle
The Rock Cycle
Sedimentary rock forms when loose rock
and other materials are carried by water
and wind and then layered.
Minerals can grow on this rock over time.
Sedimentary rock can also form when
water evaporates.
The Rock Cycle
Metamorphic rock forms when heat and
pressure cause older rock to change into
new rocks.
The heat and pressure can cause the rock
and the minerals to change over time.
The Rock Cycle
Most of earth’s crust is made up of
igneous and metamorphic rock. 95%
Sedimentary rock that forms in thin
layers only make up 5% of the earth’s
crust.