EARTH AND LIFE SCIENCE
EXOGENIC PROCESS
AGENDA
Objectives
01
Review
02
Discussion
03
Activity #1
04
Reading of Objectives
Review Activity: Complete the concept map
Exogenic Process
Jumbled Words
Objectives
01.
Kindly read the objectives of the lesson.
OBJECTIVES
At the end of the lesson, the students are expected to;
1. describe how rocks undergo weathering;
2. identify the agents of erosion; and
3. explain how the products of weathering are carried away by erosion and deposited elsewhere.
Review Activity
02.
Activity 1, 2, and 3
Instruction: Organize the disordered letters.
Activity 1: Complete the table.
Guide Question:
1. What is the difference between the data in the table?
2. What is the difference between physical and chemical change?
Activity 2: Spot the Difference
03. Discussion
Weathering
breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice.
2 Types of Weathering
Mechanical/Physical
Chemical
transforms the original material into a substance with a different composition and different physical characteristics.
is the
disintegration of rock into smaller and smaller fragments.
2 Types of Weathering
Mechanical/Physical
Chemical
The processes that lead to the mechanical disintegration of rocks
Frost Wedging
refers to the alternate freezing and thawing of water inside the joints of the rock causing them to split into small particles or fragments.
FROST WEDGING
The processes that lead to the mechanical disintegration of rocks
Frost Wedging
Abrasion
wearing away of rocks by constant collision of loose particles
refers to the alternate freezing and thawing of water inside the joints of the rock causing them to split into small particles or fragments.
ABRASION
The processes that lead to the mechanical disintegration of rocks
Frost Wedging
Abrasion
Salt Crystal Growth
wearing away of rocks by constant collision of loose particles
refers to the alternate freezing and thawing of water inside the joints of the rock causing them to split into small particles or fragments.
force exerted by salt crystal that formed as water evaporates from pore spaces or cracks in rocks can cause the rock to fall apart
Salt Crystal Growth
The processes that lead to the mechanical disintegration of rocks
Block Disintegration
caused by the successive heating
and cooling that causes the expansion and contraction of rocks.
Block Disintegration
The processes that lead to the mechanical disintegration of rocks
Block Disintegration
Exfoliation
caused by the successive heating
and cooling that causes the expansion and contraction of rocks.
happens when rocks at depth are brought to the surface of the Earth and experience a progressive removal of pressure.
Exfoliation
Biological Activity
Chemical weathering
- decomposes rock through chemical reactions
Major Processes of Chemical Weathering
Dissolution
dissociation of molecules into ions; common example includes dissolution of calcite and salt
Dissolution
Major Processes of Chemical Weathering
Dissolution
Hydrolysis
dissociation of molecules into ions; common example includes dissolution of calcite and salt
change in the composition of minerals when they react with water
Hydrolysis
Major Processes of Chemical Weathering
Dissolution
Hydrolysis
Oxidation
reaction between minerals and oxygen dissolved in water
dissociation of molecules into ions; common example includes dissolution of calcite and salt
change in the composition of minerals when they react with water
Oxidation
Major Processes of Chemical Weathering
Dissolution
Hydrolysis
Oxidation
Carbonation
reaction between minerals and oxygen dissolved in water
dissociation of molecules into ions; common example includes dissolution of calcite and salt
change in the composition of minerals when they react with water
process involving the formation of various types of carbonates in rocks.
Carbonation
Weathering is an important process in the formation of soil. Soil is a mixture of grains, organic matter, H2O, and gas.���Erosion is the separation and removal of weathered rocks due to different agents like water, wind, and glacier that causes transportation of the material to where they are deposited. Plants, animals, and humans play an important role in the erosional process.
AGENTS of EROSION
Running water
Ocean/Sea waves
Glaciers
Groundwater
Wind
Gravity
Running Water
Ocean/Sea Waves
Glaciers
Wind
Groundwater
Gravity
What questions do you have?
Activity 1
Complete the concept map
Activity 2: What Can I do
What questions do you have?
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