Date: April 08, 2024
Quarter 3-Week 5
Day 2
SEMI-DETAILED LESSON PLAN IN SCIENCE 5
I.
OBJECTIVES
At the end of the lesson the learners should be able to:
a) Identify the mechanical and chemical weathering.
b) Conduct experiments to simulate chemical weathering reactions and observe their
outcomes.
c) Develop an appreciation for the role of weathering in shaping the Earth’s surface.
II.
SUBJECT MATTER
Topic: Weathering
References:https://www.scribd.com/document/516630438/Science5-Q4-Mod1HowRocksTurnIntoSoil-v2
Materials: Laptop, PowerPoint presentation, pictures
III.
PROCEDURE
A. Preliminary Activities
 Prayer
 Greetings
 Checking of attendance
 Drill
B. Review
Direction: Underline the word true if the statement is correct and false if it’s not.
1. True or False: Electricity can only flow through a complete circuit.
2. True or False: Insulators are materials that allow electricity to flow easily.
3. True or False: A switch is used to open or close a circuit.
4. True or False: Bulbs in a series circuit get brighter when more bulbs are added.
5. True or False: Conductors are materials that allow electricity to flow easily.
C. Motivation
Direction: Analyze the puzzle below. Find the 5 words related to mechanical
weathering inside the box.
D. Lesson Proper
Weathering is the process by which rocks and minerals on the Earth’s surface are
broken down into smaller pieces over time.
Mechanical weathering involves physical processes like freezing, thawing, or
abrasion that break rocks into smaller pieces without changing their chemical
composition.
Chemical weathering involves the breakdown of rocks through chemical reactions,
such as the dissolution of minerals by acidic rainwater or the oxidation of minerals
by oxygen in the air.
E. Generalization
1. How does weathering contribute to the formation of soil?
2. What are some factors that influence the rate of weathering in a
particular area?
3. How does weathering impact the shape and structure of natural
landforms over time?
F. Application
Activity 1
Directions: Perform the activities by following each step carefully. Observe it
properly and write your answers for the guide questions in your Science notebook.
Activity 1: Mechanical Weathering: Pounding
Things you need:
1 piece of chalk
Hammer
A piece of cloth
Reminder:
Do not play with the hammer and chalk
What to Do:
1. Wear goggles.
2. Get a piece of chalk and enclose it with a piece of fabric.
3. Pound it using a hammer. (Be extra cautious in using it.).
4. Observe what happens to the piece of chalk
Guide Questions
1. What happened to the piece of chalk when beaten with a hammer?
2. What sort of progress did the piece of chalk go through? Why?
IV.
EVALUATION
Directions: Choose the letter of the correct answer:
1. Which of the following is an example of mechanical weathering?
A) Acid rain dissolving limestone
B) Plant roots breaking apart rock
C) Oxygen reacting with iron to form rust
D) Carbon dioxide dissolving in water to form carbonic acid
2. Chemical weathering is primarily caused by:
A) Physical forces like wind and water
B) Plant roots breaking apart rocks
C) Chemical reactions between minerals and substances like water or acids
D) Abrasion from particles carried by wind or water
3. Which factor does NOT typically influence the rate of weathering?
A) Temperature
B) Humidity
C) Rock composition
D) Distance from the equator
4. Which of the following is a result of weathering?
A) Formation of sedimentary rocks
B) Formation of igneous rocks
C) Formation of metamorphic rocks
D) Formation of molten lava
5. Which type of weathering is responsible for the formation of features like caves and
sinkholes?
A) Mechanical weathering
B) Chemical weathering
C) Biological weathering
D) Erosion
V.
ASSIGNMENT:
Direction: Make a research about agents of weathering.
PREPARED BY:
NICOLE MAE F. SAPLACO
Teacher Intern
CHECKED BY:
IVY S. REPOLLOSA
Cooperating Teacher