Transcript Rock - My CCSD

4-1 pgs. 80-86
IN:
Can you
diagram the rock
cycle?
 The
Earth’s crust is made mostly
of rock.
 Rock
is simply a
solid mixture of
crystals of one or
more minerals.
 Rock
has been an important
natural resource as long as
humans have existed.
◦ Early tools
◦ Buildings
◦ Roads
◦ Monuments
◦ Concrete
 The
study of rocks helps answer
questions about the history of
Earth and our solar system.
 The
fossils some rocks contain
also provide clues about lifeforms that lived billions of years
ago, long before dinosaurs walked
the Earth.
 The
rocks in the Earth’s crust are
constantly changing.
 The
rock cycle is the process by
which one rock type changes into
another rock.
sedimentary
compaction,
rock
cementation
metamorphic
rock
sediment
igneous
rock
magma
 Sedimentary
◦Weathering and erosion
 Metamorphic
◦Heat and pressure
 Igneous
◦Melting and Cooling
 Composition
of a rock.
is the makeup
◦The minerals and elements
present in the rock.
 The
texture of a rock is
determined by the sizes, shapes,
and positions of the grains of
which it is made.
◦ Fine-grained
◦ Medium-grained
◦ Coarse-grained
OUT:
List two
ways rock is
important to
humans today.