sculpturing earth’s surface
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Sculpturing Earth’s Surface. Unit 3: Chapter 4. Big Idea/Essential Questions. Weathering, Erosion and Deposition continuously alter and shape the earth’s surface. Essential Questions How does mass wasting sculpt the earth’s surface? - PowerPoint PPT PresentationTRANSCRIPT
SCULPTURING EARTH’S SURFACEUnit 3: Chapter 4
Big Idea/Essential Questions Weathering, Erosion and Deposition
continuously alter and shape the earth’s surface.
Essential Questions How does mass wasting sculpt the earth’s
surface? Explain how chemical weathering alters
materials at the earth’s surface?
ES Standards: 3.1 SIS Standards 1-4
Key Vocabulary Chemical
weathering Differential
weathering Eluviation Horizon Lahar Leaching Mass Wasting
Mechanical weathering
Regolith Soil Profile Solifluction Solum Spheroidal
weathering Weathering
Earth’s Processes What are some processes that shape the
earth’s surface? External
Driven by energy from the sunBreaks apart rock and moves debris
Examples: Weathering, Mass Wasting, Erosion
InternalDriven by earth’s interiorGradually forms mountains and
volcanic activity Example: Plate Boundaries
WeatheringWhat are some examples you have seen of weathering?
2 types Mechanical Chemical
Mechanical Weathering Smaller pieces without changing
composition Why would smaller pieces weather
faster? Types of
Frost Wedging (aka Frost Action) Salt Crystals Unloading (aka Exfoliation) Biological Activity
Chemical WeatheringAlters composition of rockTypes of
Water Oxidation Carbonic Acid
Question of the Day
What factors would influence the rate at which a rock weathers?
SoilWhat is soil?
Texture is based on size of particles Peds give soil structure; determines
porosity and permeability of soil Platy, spheroidal, prismatic, and blocky
What do factors due you think control soil formation?
How is soil eroded? The rate at which it is eroded?
Mass WastingWhat is the driving force behind mass wasting?
What are some triggers of mass wasting?
Classifying Mass WastingType of Motion
Fall Slides Flow
Rate of Movement
Types of Mass WastingSlumpRockslideDebris Flow (aka mudflows)EarthflowCreepSolifluction