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Transcript
Entry Task
Monday, October 19th
Decide if the following
statements are true or false.
If true, write them down as is.
If false, write down a
corrected statement.
1. Sedimentary rocks form
from older rocks.
2. Most sedimentary rock is
found at the surface of
Earth’s crust.
3. Some sedimentary rocks
form as loose materials get
cemented together.
Schedule:
• Sedimentary Rocks
Objective: I can understand
that sedimentary rocks form
from earlier rocks
Homework:
• Read/RSG 3.4
Please have on your desk:
• 3.3 RSG
Tuesday, October 20th
Entry Task
Schedule:
• Metamorphic Rocks
Answer the following question
Objective: I can understand
using full sentences, IQIA.
that metamorphic rocks form
as existing rocks change
1. What conditions can cause
a sedimentary or igneous
Homework:
rock to change into a
• Chapter 3 Review only the
metamorphic rock?
first page (#1-11)
2. How do new minerals grow
within existing rocks?
Please have on your desk:
3. Why do bands of minerals • 3.4 RSG
develop in most
metamorphic rocks?
Wednesday, October 21st
Entry Task
1.
2.
3.
4.
Schedule:
• Rock Vocabulary
Write down the big • Rock Review
idea for chapter 2
Objective: I can understand
Write down the
important terms associated with rocks
key concepts for
Homework:
each section in
chapter 2
• Chapter 3 (rock) review due
Write down the big
tomorrow
idea for chapter 3 • Chapter 2/3 Test on Tuesday
Write down the
10/26!!!
key concepts for
Please have on desk:
each section in
chapter 3
• Rock Review
Chapter 3 Vocabulary WordsHighlight the following words and
their definitions in your notebook.
ISN pages 48-57
•
•
•
•
•
•
Rock
Rock cycle
Igneous rock
Sedimentary rock
Metamorphic rock
Intrusive igneous rock
•
•
•
•
•
Extrusive igneous rock
Sediment
Metamorphism
Recrystallization
Foliation
Thursday, October
Entry Task
• You will be taking
rock notes today.
• Grab a note
packet up at the
front desk.
• Glue it into your
notebook on page
59
nd
22
Schedule:
• Rock Notes
Objective:
•I can understand important information
about rocks
Homework
• On page 60 in your notebook: copy
the diagram from page 107 in your
textbook. Answer questions 1-8.
Write out the entire question, and
the entire answer. I do not want to
see #1: C
Please have on desk:
• Chapter 3 review will be stamped
tomorrow
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.
•
•
•
•
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 page 79
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)
IGNEOUS ROCKS
Rocks that form when molten (melted)
rock cools and becomes a solid
Temperatures deep within the Earth are so hot (1400 °F2300 °F) that rock will melt
MAGMA
Molten Rock that is
below the surface of
the Earth
LAVA
When magma reaches
the surface of the Earth
it is called Lava
1. Composition
Igneous rocks are classified by how much silica
content they have
Igneous rocks are mostly made of silicate
minerals (silica and oxygen)
Color will give you a good estimate of the
amount of Silica
HIGH LEVELS OF SILICA
LOW LEVELS OF SILICA
Color= Light
Color= Dark
GRANITE
BASALT
RHYOLITE
GABBRO
2. Origins of Igneous rocks
Magma and Lava form different types of igneous rocks
INTRUSIVE IGNEOUS ROCK
EXTRUSIVE IGNEOUS ROCK
One that forms when
magma cools within the
Earth (INside)
One that forms when
lava cools on Earth
surface (EXterior)
Granite
Rhyolite
Pumice
same composition
Same composition
Gabbro
Basalt
3.TEXTURE- the size of its mineral crystals
-Depends on how fast the magma or lava cool
Intrusive- Stay below
the Earth
Extrusive- At the
surface
LARGE CRYSTALS FORM FROM
MAGMA
1. The interior is very hot
2. High temperature allows
for slow cooling
3. Slow cooling allows time
for LARGE CRYSTALS
SMALL CRYSTALS FORM FROM
LAVA
1. The surface is cooler
than inside Earth
2. Low temperatures cause
lava to cool fast
3. There is no time for large
crystals to form
ROCK FORMATIONS
Igneous rocks make long-lasting landforms
INTRUSIVE ROCK FORMATIONS
EXTRUSIVE ROCK FORMATIONS
• Magma can slowly cool
inside a volcano.
• Over time, wind and water
can wear away surrounding
rock to expose the intrusive
rock.
• These landforms are harder
and longer lasting than
other types of rocks
• Lava erupts in different
ways
• 1. low silica lava, like basalt,
flows easy in thin layers
(Hawaii, Columbia Plateau)
• 2. High silica lava builds
steep cone shaped
volcanoes and erupt
explosively (Mt. St. Helens)
Devils rock and Ship rock
Are examples of Intrusive
Rock Formations
HAWAIIAN ISLANDS
Low Silica lava flow form extrusive rock formation
in thin layers
MT. ST. HELENS
High Silica Lava forms Extrusive land formation
with violent erupts
3.3 Sedimentary Rocks
• Some rocks form from rock particles
• Most sedimentary rocks form from loose
material that gets pressed together.
• Sediments are materials that settle out of
water or air.
• Sediments can be loose pieces of rocks and
minerals or even plant and animal remains.
Sedimentary rocks develop layers
Types of Sedimentary Rock
• Made of other rock particles, classified by
particles size.
– Big particles (pebbles and bigger) conglomerate,
puddingstone
– Smaller particles – sandstone, shale, mudstone.
• Made of plants or shells
– Plants (formed in swamps) coal
– Shells (dissolved or not) limestone, chalk
3.4 Metamorphic Rock
• Heat and Pressure can change a rock
• Because pressure and temperature increase
with depth, rocks change more when they are
buried deeper in the crust.
• The deeper the rock, the more heat and
pressure it is exposed to, the more it changes.
Foliated vs. Nonfoliated Rocks
• Foliation is an arrangement of minerals in flat
or wavy parallel bands.
• Foliation occurs when rocks are under
pressure.
– Rock must contain more than one type of mineral.
• Nonfoliated rocks occur when heat and
pressure are applied to rocks that contain only
one kind of mineral
– Limestone becomes Marble
Foliated vs. Nonfoliated Rocks
Friday, October 23rd
Entry Task
Lets review minerals1. What are the 4
characteristics of
minerals? (bonus points
if you can name the 5th
one)
2. What are 8 properties
of minerals?
3. How would you identify
a mineral if you found it
in nature?
4. What is something that
minerals are used for?
Schedule:
• Mineral Identification Activity
Objective
• I can identify minerals based on
their properties
Homework:
• Complete lab/activity packet
Please Have on Desk:
• Rock Project