Download Rocks

Monday, October 29th
Entry Task
Think about any information that
you feel unsure about when it
comes to rocks. List 3 things
you would like further
information on or for me to
clarify.
Schedule:
• Rock Notes
Objective: I can
understand important
information about rocks
Homework:
• Chapter 3 review p. 105
#1-34
• Chapter 2/3 test on
Wednesday
ROCKS
• A Rock is a naturally
formed solid that is usually
made up of one or more
types of minerals
ROCKS vs. Minerals
Rocks
1.Proportions of minerals
vary
2. Minerals can be
jumbled together
3.None to 1 or more
minerals can be present
Minerals
1. Is the same elements
in the same
proportions
2. There is an orderly
crystal structure
Examples of Rocks
Rocks with no minerals
OBSIDIAN – glass like and does
not have a crystal structure
1 or more minerals
LIMESTONE- can be made
entirely of calcite
COAL- is made of dead plants
GABBRO- made of several
types of minerals
Our world is built of rocks
Rock is so common and has
many purposes
They last a long time
1. Building houses and
skyscrapers
2. Sources of metal like iron
aluminum and copper
3. Carvings of statues and art
4. Pavement on roads and
highways
Ancient structures,
monuments and sculptures
were made from rock
• Great wall of china
• Pyramids in Egypt
• Mount Rushmore
Rocks change as they move through
the rock cycle
The Rock cycle is a set of natural processes that
form, change, and break down, and reform rock.
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Rocks are classified by how they form
There is no particular order to the rock cycle
There is no beginning and no ending
These changes take thousands to million of years
TYPES OF ROCKS
1. IGNEOUS- Forms when molten rock cools and
becomes a solid (lava and magma)
2. SEDIMENTARY- Forms when pieces of older rocks,
plants, and other loose materials are pressed
together at the earths surface (weathering and
erosion)
3. METAMORPHIC- Forms when older rocks buried
deep in the crust change into new types of rock (heat
and pressure)
Tuesday, October
Entry Task
1.
2.
3.
4.
th
30
Schedule:
Write down the big idea • Chapter 2/3 review
for chapter 2
Objective:
Write down the key
•I can understand important
concepts for each
information about minerals and
section in chapter 2
rocks
Write down the big idea
for chapter 3
Homework
Write down the key
• Chapter 2 review- page 69-70
concepts for each
# 1-29 in your notebook
section in chapter 3
Please have on desk:
• Chapter 3 review
Wednesday, October 31st
Entry Task
1.What are 3 things that you
learned from chapter 2?
2.What are 2 things that you
need to study more from
chapter 2?
3.What are 3 things that you
learned from chapter 3?
4.What are 2 things that you
need to study more from
chapter 3?
Schedule:
• Chapter 2/3 test
Objective: I can understand
important information about
minerals and rocks
Homework:
• Chapter 4 intro
Please have on desk:
• Chapter 2 review
Thursday, November 1st
Entry Task
Look at the photograph on page
112 and answer the following
questions using full sentences,
IQIA.
1. What are some examples of
natural forces?
2. Which natural forces might
break apart rocks?
3. What might happen to rocks
after they break apart?
Schedule:
• Bill Nye-Weathering and
Erosion
Objective: I can
understand basic
information about
Weathering and Erosion
Homework:
• Read/RSG 4.1
Please have on your desk
• Chapter 4 intro
Entry Task
Friday, November
Imagine you are hiking in the
forest and pass a young
oak tree growing in the
crack of a large rock.
1. Describe what will happen
to the rock as the tree
grows into a full-grown oak
2. Is this an example of
mechanical or chemical
weathering?
3. What is likely to happen as
a result of this happening?
nd
2
Schedule:
• Weathering and Erosion
Notes
Objective:
•I can understand that
chemical and mechanical forces
break down rock
Homework
• 4.1 quiz Monday
• 4.1 questions #1-6
Please have on desk:
• 4.1 RSG
•
•
Weathering is the process by which natural
forces break down rocks.
There are 2 types of weathering:
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Mechanical weathering
Chemical weathering
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•
Mechanical weathering is the breaking up
of rocks by physical forces.
There are 4 main types:
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Ice wedging
Exfoliation
Plant root growth
Abrasion
•
When water freezes, it
expands. When water
freezes in the cracks and
pores of rocks, the force
of its expansion is
strong enough to split
the rocks apart.
•
The process in which
layers or sheets of
rock gradually break
off due to the
expansion of the rock
caused by a decrease
in pressure.
•
Trees, bushes, and other
plants may take root in
cracks of rocks. As the
roots of these plants
grow, they wedge open
the cracks.
•
The process of wearing
down by friction, the
rubbing of one object or
surface against another.
•
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The breakdown of rocks by chemical
reactions that change the rocks’ makeup,
or composition.
There are 2 main types:
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Dissolving
Rusting
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Water is the main cause of
chemical weathering.
Many more minerals
dissolve in water that is
slightly acidic – like
lemonade.
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The oxygen in air is also involved in
chemical weathering.
Many common minerals contain iron.
When these minerals dissolve in water,
oxygen in the air and the water combines
to produce rust.
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Most weathering occurs over long periods
of time – hundreds, thousands, or even
millions of years.
There are 3 Influential factors:
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Surface area
Rock composition
Climate
•
The more of a rock’s surface that is
exposed to air and water, the faster the
rock will break down.
•
Different kinds of
rock break down at
different rates.
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Chemical weathering occurs faster in hot,
wet regions than it does in cold, dry
regions.
Mechanical weathering caused by freezing
and thawing occurs more in cold regions
than in hot regions.