Weathering And Erosion

Weathering The process that breaks down rock and other substances on Earth’s Surface. Weathering. clip.asf

Pair/Share 1.What is weathering? 2.Is weathering the same as weather?

Two Types of Weathering Pg. 58 Mechanical Weathering Examples: A type of weathering in which rocks are physically broken into smaller pieces. A physical change includes change in size and shape. Freezing and thawing, animal actions, abrasion.

Release of Pressure Abrasion Freezing and Thawing.

Pair/Share Read Figure 12 on page 58 and 59 with your partner and discuss the different types of Mechanical Weathering? Be able to explain each one!

Chemical Weathering Chemical change caused by a chemical reaction. One substance changes into another. Example: Iron + Water + oxygen = Rust Chemical Weathering Clip Chemical_Weathering.video

Pair/ Share 1.What is the difference between chemical and mechanical weathering?

Water Water weathers rock by dissolving it.

Oxygen Water + Oxygen +Iron = RUST When water and oxygen mix with Iron it creates rust. This is called oxidation. Rust video

Carbon Dioxide Carbon dioxide dissolves in rain water and produces Carbonic acid. This Carbonic acid easily weathers marble and Limestone. Cave_formation video clipCave_formation video clip

Living Organisms Some plants and animals can produce weak acids that chemically weather the rock.

Acid Rain Acid rain video clip Pictures of weathering When pollution from the air contaminates the rain, it causes rapid chemical weathering.

Pair/Share 1.What forms Carbonic acid? What type of rock does it weather? 2.What is oxidation and what does it weather? 3.What are two things that create the pollution that forms acid rain? 4.What is the dominant process that causes weathering? (hint: what liquid is involved in almost every example.)

Erosion

The movement of rock and particles by wind, water, ice or gravity. What_Is_Erosion video clip Erosion video clip

Difference between weathering and erosion Weathering breaks earth down and erosion moves the broken pieces around. 1 min video segment on weathering and erosion

Pair/share: Weathering or Erosion Water continently drips on a rock in the same place and slowly dissolves the rock over time. Water carries small rocks and sand down stream. Wind blows the sand pile from one area to another A tree grew in the rock and it’s roots break the rock into smaller pieces. Wind blows sand on the rock breaking it down over time.

Sediment Deposition Gravity Is the material moved by erosion. Occurs where the agents of erosion lay down the sediment. (drop it off) The force that moves rock and other sediment downhill. Gravity causes mass movement of sediment.

Weathering, Erosion, and Deposition act together in a cycle that wears down and builds up Earth’s surface. Erosion Weathering Deposition explain weathering, erosion and deposition is 60 sec. mass movement animation

Pair/share What does the word deposit mean? What is sediment? What is the difference between weathering, erosion and deposition? How do weathering, erosion and deposition work together to shape the land? What is the dominant process that shapes the land?

Weathering breaks it. Erosion moves it. Deposition drops it. What is it? Sediment!

Please sing aloud to the tune of Row Row Row Your Boat Ero ro ro sion Moves sediment down the stream Gravity, wind, water, and ice Deposition is what is seen

Warm-up #1 1.What is the difference between weather and weathering? 2.List the five types of Mechanical weathering. 3.Describe two of the five types of mechanical weathering.

Warm-up #1 When Carbon Dioxide mixes with water what does it form? It forms carbonic acid which weathers limestone and marble What type of weathering breaks down rock through chemical changes? Chemical weathering What causes a bike to rust? What does this have to do with the weathering of rock? When the metal mixes with water and oxygen it changes to rust. The metal in rocks can rust causing the rock to break down.

1.What is weather? 2.How does excess CO2 in the atmosphere create global warming? 3.What is runoff? 4.Why is water important?

Warm-Up # 1 1.What is the difference between chemical and mechanical weathering? 2.What type of weathering is freezing and thawing? 3.What are 3 factors that can effect the rate of weathering? 4.What type of weathering breaks down rock through chemical changes?

Warm up #2 1.What is the difference between weathering, erosion and deposition 2.Most chemical weathering is caused by what? 3.What factors effect the rate of weathering? 4.What is sediment? 5.What are the forces of erosion? 6.What is the dominant process that causes weathering and erosion?

Warm-up # 3 1.What are the forces that cause erosion? 2.What is the dominant process that causes erosion? 3.The steeper the slope of the mountain the __________ erosion occurs. 4.What weathers limestone and marble? 5.What causes metal to oxidize? 6.What is sediment?

Warm-up # 4 1.What is the force that pulls water downhill? 2.What type of weathering breaks rock into smaller pieces? 3.What does Carbon Dioxide mixed with water form? 4.What are the 4 agents of erosion? 5.What are three things that Topography shows us?

Warm-up # 6 What is a contour interval? The space between contour lines. When Carbon Dioxide mixes with water what does it form? Carbonic Acid and it weathers limestone and marble. What is mass movement of rock? What causes it? When large amounts of rock fall or move due to the force of gravity. What are small, solid particles of rock or organisms called? Sediment

Weathering and Erosion Types of Mechanical Weathering Agents of Weathering and Erosion Effects of Weathering and Erosion Types of Chemical Weathering