DO NOW—Pre-think

1. Weathered Rocks Erode Worksheet (on desk)

2. Where do you think rocks come from or what do you think rocks are made from?

3. What types of environmental issues did you learn about in Social Studies in Europe? How did they effect statues and the environment?

Erosion and Weathering

Gallery Walk

• Observation: What do you see in the picture?

• Hypothesis: What do you think caused this to happen?

Move silently & work quickly!

Share:What do you think?

• http://www.brainpop.com/science/weather/weathering/ --What we are doing today!

• http://www.brainpop.com/science/earthsystem/erosion/ --What we are learning tomorrow!

Let’s see, watch and learn:

Weathering:

Mechanical (Physical) Weathering--when a rock is broken into smaller pieces or rubbed off— doesn‘t change the chemical composition of the rockExamples: Ice cracking a rock, a rock split in half, sand hitting rocks & breaking pieces off (abrasion), wind, water

Like humpty dumpty you can put it back together again with all the pieces.

Weathering:Chemical Weathering—when a rock is broken down through a chemical change

Examples: Rust, air’s oxidation (turns green), water’s acidity (acid rain) eating holes into statue

Break down this term:Oxidation sounds like oxygen and oxygen is in the air—so oxidation is chemical weathering by air

Pieces are lost forever or “eaten up” —can’t put it back together or change it back!

Weathering:Biological Weathering-when rocks are broken down by living organisms

Examples: tree roots cracking the sidewalk, microorganisms produce organic acids which help to dissolve minerals.

Is biological weathering more similar to mechanical or chemical? Why?

Sphinx Mystery Uncovered:• The head was made up of a harder strata—so it

avoided a lot of weathering. (its nose was taken off by soldiers in the 18th century.

• The body was made out of softer limestone (what kind or rock is this?

• Some weathering by wind and sand and dust has occurred.• However, it is believed that flooding from the Nile River led to extreme water erosion.

Statue of Liberty Mystery Uncovered:• The statue of liberty is

made of copper (like a penny) over time it is being oxidized by water and air– a form of chemical weathering—making it green instead of silver.

Castle Mystery Uncovered:• The largest “active”/ “living” Sand Dune on the East Coast—Jockey’s Ridge North Carolina

• The amount of sand making up the 420 acres of Jockey's Ridge is equal to about 6,000,000 dump truck loads!

• The Sand is mostly quartz rock which came from the mountains millions of years ago.—what kind of rock is quartz rock?

Castle Mystery Uncovered:

• Each year winds from each directions erode the Dune, picking up sand and moving.

• Over time the Dune moved so much it covered an old Put-put coarse—which the castle was part of.

• Over more time the Dune moved so much that it is uncovering the Put-put coarse and unveiling a weathered/eroded castle—wind and sand weathering.

CFU1. Explain physical weathering. Give an

example.2. Explain chemical weathering. Give an

example.3. What is abrasion? What type of weathering

is abrasion associated with?4. What is biological weathering. Is biological

weathering related more closely to chemical weathering or physical weathering? WHY???

Weathering Analogies

• Example: Chemical weathering is like the process of a caterpillar turning into a butterfly—it is totally changed and can’t change back.

• Mechanical weathering is like a butterfly getting a tear in its wing—it is still a butterfly.

Spend 10 minutes in your table group creating an analogy poster for the two types of weathering.

Another Example if needed:

• Mechanical Weathering is like splitting your oreo in half—it is still an oreo.

• Chemical Weathering is like dunking the oreo in milk—it gets soggy and changes a lot.

Catalyst—HW due ThursdayProgress Report Cards on desk!

1. What are the two types of weathering?2. What can cause mechanical weathering?3. What can cause chemical weathering?4. What is ice cracking a rock an example

of?5. What is a rusting car an example of?

Weathering Mystery Lab

Exit Ticket

DO NOW- HW due Wednesday 12/9

1. A penny rusting in water is ____________ weathering.

2. A crack in pavement from ice is _______________ weathering.

3. A crack in pavement from a tree root is _______________ weathering.

4. What is the difference between mechanical and chemical weathering?

5. How is biological weathering related to both chemical and mechanical weathering?

6. What do you think erosion is?

Announcements• Weathering, Erosion, and Soil Test will be next

Friday December 11th! • This is the last diploma test for the semester!!!

1. Erosion is the natural moving of material from one place to another.

Erosion

• http://www.brainpop.com/science/weather/weathering/ --What we learned last Thursday!

• http://www.brainpop.com/science/earthsystem/erosion/ --What we are learning Today!

Erosion is caused by:

1. Wind (blowing things away)2. Water (rivers, oceans, rain)3. Gravity (pulls things down mountains)4. Ice (glaciers)5. Humans (cutting down trees, moving dirt and

rocks, building on land, etc).

Grand Canyon Mystery Uncovered:

• Carved out (eroded) by the Colorado River (water) over the past 17 million years.

Landscape Mystery Uncovered:• Glaciers carve through

plateaus, mountains and land easily, causing weathering and erosion

•

Weathering breaks it downErosion moves it around

Deposition let it dropCompact & Cement will make it rock

Weathering and Erosion Song & Mini-Lab:

A DAY AT THE BEACH!

-- one half of room will come to pool with Ms. Pendergrass and answer lab questions on lab sheet (to be stapled into notebook)

--one half of class will read and answer questions from CRCT prep book—DO NOT WRITE ON COPIES—answer questions in notebook

Exit Ticket

Review game:

http://www.kineticcity.com/mindgames/warper/

Catalyst

1. What is the difference between weathering and erosion?

2. List and explain the 3 types of weathering?3. What are the 5 agents of erosion?4. Dirt is blowing across a field. Is this an

example of weathering or erosion? WHY?5. The face of the Sphinx in Egypt is wearing

away by the sand that is hitting it. Is this an example of weathering or erosion? WHY?