Download Rock Cycle unit 2 lesson 3

I. The Rock Cycle
A. Processes that shape the Earth
https://youtu.be/BsIHV__voMk
1.
Rock= Naturally occurring solid mixture of one or
more mineral and organic matter
2.
Rock cycle= continual process by which new rock
forms from old rock material
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3.
Rocks are always changing
Values of rocks
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Make tools (hammers, knives, arrowheads)
Used in construction of buildings
Concrete has rock as an ingredient
B. Processes that shape rock and the Earth
1.
Weathering, erosion & deposition
a. Weathering= process in which water, wind, ice
& heat break down rock
https://youtu.be/ktf73HNZZGY?list=PLXR_HtDPvlm8tvSbWQVwEKBdLmFbpBhMV
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b.
Erosion= process by which sediment is
removed from its source
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c.
Fragments are what makes sedimentary rocks
Wind, water, ice & gravity can erode and move
sediments & cause them to collect
Deposition= process in which sediment moved
by erosion is dropped and comes to rest
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Sedimentary rock is formed when sediments are
pressed together
2.
Heat and pressure can cause sedimentary rock to
be formed
a.
b.
c.
3.
Sediment is squeezed under intense pressure
If heat and pressure get high enough to melt the
rock it will change into metamorphic rock
When melting creates magma it will cool into
igneous rock
Uplift will continue the rock cycle by re-exposing
the rock to weather, erosion & deposition
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Uplift= movement within the Earth that causes
rocks inside the Earth to be moved to the surface
C. Rock Cycle
1.
http://www.schooltube.com/video/503ca205aae459f47494/The-Rock-Cycle
Sedimentary rock= grains of sand & sediments erode
from hills & mountains & get deposited down rivers to
the ocean floor
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Sediments will get compacted on top of each other and
form Sedimentary Rock
2.
Metamorphic rock= large pieces of Earth’s crust
(sedimentary rock) is forced down into great
temperatures and pressures & changes to metamorphic
rock
3.
Metamorphic rock will melt and form a hot liquid called
magma
4.
Igneous rock forms when the magma moves up and is
cooled & solidifies
5.
Uplift & erosion break up the igneous rock transforming
it back into sediments
5.
Rock cycle does not have to follow one path
6.
Position depends on how the rock processes will
change the rock
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Rocks deep in the Earth are affected by pressure
and temperature
Rocks at the surface are affected by erosion,
weathering & deposition
D. Tectonic plate motion affects the rock cycle
1.
Uplift= rising of regions of
the crust to higher elevations
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2.
Subsidence= the sinking of
regions of the crust to lower
elevations
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3.
Increases the rate of erosion
Leads to the formations of
basins for sediments to
deposit
Rift zones= area where a set
of deep crack form
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Common between tectonic
plates that are pulling apart