Transcript Weathering, Erosion, Deposition PowerPoint

Weathering/Erosion/Deposition
V-Map
1 side for chalk
1 side for m&m’s
Do Now
SWBAT describe mechanical weathering
1. Where do pebbles and small particles of rock come from?
2. Did anyone carve pumpkins this weekend?
V-Map
1. Pretend the whiteboard is a piece of paper.
2. Copy the V-Map on the whiteboard down on to your
paper. COPY IT EXACTLY AS IT IS ON THE BOARD.
Mechanical weathering is breaking down of rocks into smaller pieces without
changing what the rock is.
Kind of like carving a pumpkin. I can carve the pumpkin, which makes smaller
pieces, but it still is a pumpkin.
Mechanical Weathering
Hypothesis- make a prediction using no personal pronouns using an
If, Then, Because statement.
You are going to weather your rock for 5 million years.
1. What will happen to an M&M if it is mechanically
weathered?
If___________________ then_____________________
because_______________________________
Procedures
1.
Make observations about the M&M in your data table
2.
Choose an M&M of your own- your favorite
3.
Take the M&M’s, and place them into the plastic container
4.
Shake the plastic container for 5 minutes
5.
(A or 1 is the timer for your group)
Initial Observations
Color, size, shape, texture
Color
Size (Cm)
Shape
Texture
Drawing
Observations after the
experiment
Weathering/Erosion/Deposition Foldable
1. Create a foldable by following the directions given to you on the sheet
2. Use the example on the board to help you make your foldable
3. Use the books to fill out your flipchart
Ch. 4 (pgs. 115-120) Weathering (work on this today)
Ch. 5 (pgs. 145-170) Erosion and Deposition
Conclusion M&M’s
1. What happened to the M&M’s
2. Thinking of the rock cycle, what process did you perform, and what would
need to happen next for your m&m to become a rock?
3. Of the 4 mechanical weathering processes, which did you demonstrate
during the lab? EXPLAIN.
4. How do you think this might happen in the natural world?
(mechanical weathering examples)
Exit Ticket
1. What is mechanical weathering?
2. What ways can mechanical weathering occur?
3. Which of the 4 ways of mechanical weathering did you demonstrate in the lab, why?
Do Now
SWBAT explain chemical weathering processes
1. Make a prediction by writing a hypothesis in an if-then-because statement using no personal pronouns.
What will happen to the fire if Mr. Wallace places Boric Acid into the flame?
(or universal indicator solution)
Weathering/Erosion/Deposition Foldable
1. Create a foldable by following the directions given to you on the sheet
2. Use the example on the board to help you make your foldable
3. Use the books to fill out your flipchart
Ch. 4 (pgs. 115-120) Weathering (work on this today)
Ch. 5 (pgs. 145-170) Erosion and Deposition
Cleopatra’s Needle
Cleopatra’s needle is an ancient stone monument
made in Egypt during the time of the Pharaohs. This
monument was moved from Egypt to New York City in
1881.
Over time it’s surface has been exposed to weathering
processes, both chemical and physical, and it has been
a challenge to keep it in good condition. The type of
stone reacts with acidic solutions easily which has
caused it to weather away.
Think-Pair-Share
1.
How does the monument get exposed to acidic
solutions (liquids)?
2.
How do you think the amount of surface area a
rock has affects how fast or slow it will weather?
V-Map
Chemical weathering is the breaking down of rocks that changes what the rock is chemically
made of.
There is always some sort of chemical reaction!
1.
Changes the color
2.
Changes the chemical composition
3.
Releases gas (bubbles)
4.
Releases odor
Chemical Weathering
Hypothesis- make a prediction using no personal pronouns using an If, Then,
Because statement.
You will weather your chalk for 5 million years
1. What will happen to the chalk if it comes in contact with vinegar
(weak acid)?
If___________________ then_____________________
because_______________________________
Procedures
1.
Make observations about the chalk in your data table
2.
Cut the chalk into a third, give one piece to each student and scratch your name on to it
3.
Place the chalk in the beaker, use the droppers to drop 20 drops of vinegar onto your chalk
4.
Note any observations after every 5 drops
5.
(A or 1 is the timer for your group)
Initial Observations
Observations During
How hard is the chalk?
Experiment
Can it be scratched by your finger nail?
Observations after the
experiment
Conclusion Chalk
In this activity the vinegar, which is acidic, reacts with the chalk (which is made
from calcite like shells of sea animals and limestone) forming carbon dioxide
gas (the bubbles you see during the reaction are the carbon dioxide gas, CO2),
water, and another calcium compound.
1. Describe what happened to the chalk?
2. Think of the rock cycle, what process of the rock cycle did you demonstrate?
3. How do you think this might happen in the natural world?
(chemical weathering examples)
4. Critically think, what role do humans play in making water (rain, oceans) more acidic?
Weathering/Erosion/Deposition Foldable
1. Create a foldable by following the directions given to you on the sheet
2. Use the example on the board to help you make your foldable
3. Use the books to fill out your flipchart
Ch. 4 (pgs. 115-120) Weathering
Ch. 5 (pgs. 145-170) Erosion and Deposition
Exit Ticket
1. What is chemical weathering?
2. What is an example of chemical weathering?
3. Mechanical weathering breaks rocks apart, exposing more surface
area. How do you think mechanical weathering can affect the rate at
which chemical weathering occurs on the rock.
4. Why would 10, 1 kg pieces of limestone weather more quickly
than one 10 kg piece of limestone?
Do Now
1. Make observations about the
picture to the right, then make an
inference. What kind of
weathering took placemechanical or chemical?
• If it’s chemical, explain what type and
why.
• If it’s mechanical, explain what type and
why.
Earth Changes
Earth is constantly changing, and events occur that can change the face of the Earth. This can
happen quickly or slowly
Rapid Changes
Slow Changes
Earthquakes
Weathering
Tsunamis
Erosion
Volcanoes
Deposition
Rock slides
Deposition Notes
Deposition occurs when there is a reduction in the energy of motion of the wind, running
water or glaciers. The heavier materials are dropped (deposited) first followed by the lighter
materials.
Wind
deposits materials when it
loses energy of motion
often due to either the wind
and particles hitting an object
or the wind slowing down.
Water
Water speed slows due to
meanders or entering
another water body so it
loses energy of motion
therefore dropping the
sediments it is carrying.
When the wind deposits
materials it may make a dune
or sand ripple.
Water can make deltas or
stream valleys
V-Shape valleys
Glaciers
When a glacier slows due
to a lack of energy of
motion
It deposits materials
along the front and sides
of the glacier as piles of
till known as moraines.
Carves a U-Shape
Gravity
Mass movement or mass
wasting is movements of
masses of bodies of soil,
bed rock, rock debris,
soil, or mud which
usually occur along
steep-sided hills and
mountains because of
the pull of gravity.
Landslides, mud slides,
and avalanches result
Deposition
What is deposition?
What are some examples of areas in which sediment gets deposited?
Boards Up
Match the following landforms with the terms below that are involved in creating them
Wind, Gravity, Running Water, Glaciers
Cut Out Organizer
Using the organizer
Think-Pair-Share
First on your own,
1. Set up the chart as shown on the paper using scissors and a sheet of paper.
2. Cut out the squares and place them under the correct heading.
Second, with your partner,
1. Compare your charts to one another's
2. Discuss why you placed the descriptions where you did, and make corrections
Exit Ticket
Use the terms below to match what each question description is associated with
Wind, Gravity, Running Water, Glaciers
Abrasion _____________________
Rock Slide ____________________
Mass Movement (Mass wasting) _________________
Delta ___________________
Moraine ______________________
Dune ____________________
Homework
Worksheet is due tomorrow
Do Now (Probably Wont Do This)
Identify the following descriptions of weathering as either Chemical or Mechanical.
1.
Tree roots cracking the concrete foundation of a house.
2.
Limestone dissolved by carbonic acid.
3.
The oxidation (rusting) of minerals in rocks that contain iron.
4.
Repeated freezing and thawing of water in the cracks of rocks.
Erosion and Deposition
Erosion and deposition change and shape the Earth around us.
1.
Using your tins, and sediment, make sure your sediment is at the correct height
2.
Place the indicator at the top of the hill.
3.
Use the water – Record speed by timing how long it takes for the slider to move
to the bottom, and measure the distance it traveled.
4.
Use ice cube- Record speed of erosion by timing how long it takes for the ice
cube to move to the bottom, and measure the distance it traveled.
Record your observations into the data table.
Close Read
Highlight
Circle words that you do not know
Underline
Horizontal Vs. Vertical Deposition Sorting
When sediment is
deposited in a lake
or a stream
The largest
sediment is
deposited where
the water moves
the fastest, and
the smallest is
where the water
moves the
slowest.
Horizontal Sorting
Vertical Sorting
When sediment is
suddenly dropped
in water the
sediments
separate by size
Largest on
bottom, smallest
on top.
Slower
River
It starts out fast due to the steep
slopes from the higher elevations then
Deposition
gradually slows down as the land
becomes more flat.
Here
As a river moves from the source
Where will larger sediment most
likely be deposited?
Where will the smaller sediment
most likely be deposited?
Larger
Sediment
Smaller
Sediment
Faster
River
Erosion
Here
STREAM VALLEY
Ver
ri
Shaped
Glacier Valley
U
-Shaped
A U-shaped valley is formed by the
movement of a glacier down a
slope. It has a characteristic U
shape, with steep, straight sides
and a flat bottom. The U-shape is
due to the erosion of the glacier
because of it’s weight as it scrapes
the bottom of the valley floor.
Exit Ticket
Do Now
QUIZ DAY
Identify the following descriptions of weathering as either Chemical or Mechanical.
1.
Tree roots cracking the concrete foundation of a house.
2.
Limestone dissolved by carbonic acid.
3.
The oxidation (rusting) of minerals in rocks that contain iron.
4.
Repeated freezing and thawing of water in the cracks of rocks.
Concept Map
Create a concept map as a
group of 3
Gallery Walk
-Note any differences or
similarities from yours
Forget something?
Something incorrect?
What questions do you
have?
Weathering
Deposition
Mechanical
Gravity
Chemical
Water
Ice Wedging
Ice
Pressure Release
Moraine
Plant Root Growth
Beaches
Abrasion
Wind
Erosion
Surface area
Dunes
Rusting
Deltas
Dissolving
Erosion, Deposition, Weathering Quiz
What are ways something can be weathered?
What are the five agents of erosion?
How does different sized sediment get deposited in a stream?
What’s a delta, dune, moraine, and beach?
Do Now
Update mastery trackers
Rocks Test Re-Takes Explanation
Plate Tectonics Vocabulary
- Frar models
Plate Tectonics Layers of the Earth
Lithosphere
Asthenosphere
Mantle
Crust
Inner
Outer core