Week 5 Day 1
Identifying materials that block light
Data was based from Science Exemplar
by Science Writing Team
Batangas Province
PPT created by:
PRECILA R. UMALI
JZMES Santa Rosa City, Laguna
Review
Classify the following materials into black or colored object. Place your answer on the chart.
magnet | Flower | Black shoes | Black ink |
Leaf | wires | tires | Colored roof |
Establishing a purpose for the lesson
What can you say about it?
Where do we usually stay during noon time? Why?
Can you imagine how people enjoy the shade of the trees if the trees do not block the sunlight?
What benefits can we get from this activity?
Presenting examples/ instances of the lesson
Mystery box. The box contains block of woods, basketball ball, tin can,vase, chalk.
a. I am round and orange in color. You used me in playing. You can dribbled and shoot me on the ring. What am I?
b. I am usually found on the table. You can put flower to me. You must handle me carefully so that I won’t broke. What am I?
c. I came into different color. You can used me in writing on the board. What am I?
d. Sardines and milk are placed inside me. Never throw me because you can recycle me. What am I?
e. I came from trees. I am not a flower, a root or a leaf. What am I?
Let us see how these objects are related to our lesson today.
Discussing new concepts and practicing new skills #1
Blocking of light
Problem: What materials do block light?
Materials: woods, basketball ball, tin can, vase, chalk, chart flashlight
Procedures:
1. Turn on the flashlight. Test if the following material block or absorbed the light.
2. Record your answer on the table. Put check (√) on the proper
Discussing new concepts and practicing new skills #2
1. Group Reporting and Presentation of Output
2. Analysis and Discussion
What can you say about the materials we used in the activity?
What evidence shows that light was blocked by materials?
Developing mastery
Shows that light was blocked by materials. Illustrate your answer.
Finding practical applications of concepts and skills in daily living
One afternoon, you and classmates are walking to go to school. The sun is too hot. What materials can you use to block the sun rays?
Making generalizations and abstractions about the lesson
How do you describe the materials that block the light?
Background Information for the Teacher
opaque materials- do not transmit light
==do not allow light to pass through them
==When light falls on opaque materials, light is blocked and cannot pass through the materials. The blocking of light of opaque materials creates a black image of the object called shadow. Examples are concrete walls, wooden doors and some mirrors
shadow – a black image which was a result of the blocking of light in opaque materials.
===The shadow formed depends on the distance and the direction where the light source came from.
=== In the opaque materials, some light is transmitted but most of the light waves are absorbed and then changed to heat.
Evaluating learning
Read the following situation carefully. Draw a star ( ) on the situations that show blocking of light of materials.
____ 1. People wear jackets during cold weather.
____ 2. Erwin, who are playing under the sun form a shadow.
____ 3. Raymond is looking to fish in the aquarium.
____ 4. Dan enjoys the shade of the tree during summer.
____ 5. Jeffrey looks to the glass of water to test if it is clear.
Additional activities for application or remediation
How would your internal organs look if your body is not opaque?
Data was based from Science Exemplar
by Science Writing Team
Batangas Province
PPT created by:
PRECILA R. UMALI
JZMES Santa Rosa City, Laguna
Week 5 Day 2
Identifying materials that absorb light
Review
List down some materials that blocked lights. Paste it on the chart
How do you describe the materials that block the light?
Establishing a purpose for the lesson
Teacher will show a mirror. Have you ever wondered why you can see your face in a mirror? This occurs because mirrors are very smooth and shiny. Light bounces, or reflects, off of the smooth and shiny surface of mirrors. When you see your face in a mirror you are seeing light from your face reflecting off of the mirror.
Discussing new concepts and practicing new skills #1
1. Group Reporting and Presentation of Output
2. Analysis and Discussion
What can you say about the materials we used in the activity?
What evidence shows that light was blocked by materials?
Discussing new concepts and practicing new skills #2
Plants make their own foods through the process of photosynthesis.
https://www.google.com.ph/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwje1b66oJrQAhUFNrwKHUGjB2QQjRwIBw&url=http://www.mstworkbooks.co.za/natural-sciences/gr8/gr8-ec-04.html&psig=AFQjCNG4mHf9BnE3fpMhfGirESXbKPySw&ust=1478732035398945
Developing mastery
Shows that light was absorbed by materials. Illustrate your answer.
Finding practical applications of concepts and skills in daily living
Your group is preparing for a trip to Baguio. You help one another to pack your clothing for the trip?
Making generalizations and abstractions about the lesson
How do you describe the materials that absorb the light?
Information for the Teacher
Light that strikes opaque materials can be reflected or absorbed. Light is reflected when it strikes on smooth and shiny surface like the mirror. It is also reflected when it falls on the light colored and shiny materials. When light is reflected, the materials do not increase in temperature and they do not become hot.
Light is absorbed when it strikes on materials with dark colors and rough surfaces. Materials with dark colors absorb light that changes to heat. These materials are called heat absorbers. You can observe heat absorber clothing that people wear during winter or cold weather.
Evaluating learning
Directions: Read the following situation carefully. Write TRUE if the situation states that light is being absorbed and FALSE if it not.
________ 1. Erwin wears dark-colored dress during cold weather.
________ 2. Leaves absorb light during the process of photosynthesis.
________ 3. While resting, Paola enjoys looking to fish in the aquarium
________ 4. In an activity, the light reflect in different colors when it strikes to the prism.
________ 5. Jeffrey looks to the glass of water to test if it is clear.
Additional activities for application or remediation
How would your internal organs look if your body is not opaque?
Week 5 Day 3
Identifying materials that transmit light
Data was based from Science Exemplar
by Science Writing Team
Batangas Province
PPT created by:
PRECILA R. UMALI
JZMES Santa Rosa City, Laguna
Reviewing previous lesson or presenting the new lesson
FACT or BLUFF. Listen to the teacher as he/she reads the following situation.
Say the word FACT if the situation states that light is being absorbed and BLUFF if it is not.
___1. Erwin wears dark-colored dress during cold weather.
___2. Leaves absorb light during the process of photosynthesis.
___3. While resting, Paola enjoys looking to fish in the aquarium
___4. In an activity, the light reflects in different colors when it strikes to the prism.
___5. Jeffrey looks to the glass of water to test if it is clear.
Establishing a purpose for the lesson
What can you say about it?
What kind of material use in making aquarium? Why?
Can you see the fish inside the aquarium if is not made of glass?
What benefits can we get from this activity?
Presenting examples/ instances of the lesson
Transmission refers to the passing of light through some materials
Different materials have different ways of transmitting light.
1.Translucent materials allow all lights to pass trough them. Ex. Stained glasses and frosted windows
2.Transparent materials transmit light when they allow all the visible light waves to passes through them. We can see the objects when light passes through a transparent materials, falls of the object, and then reflects to our eyes. .Ex. Clear plastic , glass windows
3. Opaque-materials do not allow light to pass trough them. Ex. Concrete walls, wooden doors .
Additional activity
Identify the objects transparent, translucent or opaque.
_______1. wooden blocks
_______2. white plastic bag
___3.wax paper
___4.red cellphone
___5.tinted glass
___6.brown envelope
___7.reading glasses
___8. frosted sliding door
___9. molding clay
___10.rubber tire
Evaluation
Directions: Tell if the following materials can transmit light. Write the word TRANSMIT if it can transmit and leave blank if it cannot.
__1. Plastic bottle of mineral water
__2. Lens of the camera
__3. Eye glasses of your grandmother
__4. Magnifying glass used in an investigation
__5. Clear water
Assignment
Using a mobile phone, get a picture of some
examples of materials that transmit light. Print your output. Paste it on a white paper. Make a caption.
Week 5 Day 4
Ability of the materials to block, absorb or transmit light to its use
Data was based from Science Exemplar
by Science Writing Team
Batangas Province
PPT created by:
PRECILA R. UMALI
JZMES Santa Rosa City, Laguna
Review
Establishing a purpose for the lesson
Classify the following materials based on their reaction to light.
Presenting examples/ instances of the lesson
Reaction of light
Activity 1
I. Problem: How does light react?
II. Materials: flashlight, rubber band, cellophane
III. Procedure:
1. Cover the flashlight with cellophane.
2. Turn on the flashlight.
3. Point it into the wall and look through it and describe what happens to the light.
IV. Observation:
1. What happened to the light of the flashlight covered
with the given materials?
2. Does the light able to pass through?
3. Does the appearance of light the same with the light without cover? Why?
4. Based from the activity, how is the reaction of
materials to light shown?
Activity II
Reaction of light
I. Problem: How does light react?
II. Materials: flashlight, rubber band, wax paper
III. Procedure:
1. Cover the flashlight with wax paper.
2. Turn on the flashlight.
3. Point it into the wall and focus on it and describe what
happen to the light.
IV. Observation:
1. What happened to the light of the flashlight covered with the given materials?
2. Does the light able to pass through?
3. Does the appearance of light is still the same with the light without cover? Why?
4. Based from the activity, where is the react of materials to light used?
Activity III
Reaction of light
I. Problem: How do light behave?
II. Materials: flashlight, rubber band, aluminum foil
III. Procedure:
1. Cover the flashlight with aluminum foil.
2. Turn on the flashlight.
3. Point it into the wall and focus on it and describe what happen to the light.
IV. Observation:
1. What happened to the light of the flashlight covered with the given materials?
2. Does the light able to pass through?
3. Does the appearance of light is still the same with the light without the cover? Why?
4. Based from the activity, how is the reaction of materials to light shown?
Discussing new concepts and practicing new skills #1
1. Group Reporting and Presentation of Output
2. Analysis and Discussion
What can you say about the materials used in the activity?
What evidence showed that light was block/transmit/absorb by materials?
What are the uses of ability of material to block/transmit/absorb light?
Discussing new concepts and practicing new skills #2
Group Activity.
Group 1 - On metacards, list down some examples of materials that transmitnlight. Paste it on the chart. How do we use these materials?
Group 2 - On metacards, list down some examples of materials that absorb light. Paste it on the chart. How do we use these materials?
Group 3 - On metacards, list down some examples of materials that block light. Paste them on the chart. How do we use these materials?
Developing mastery
Cite some examples and activities where you transmit, absorb or block lights.
Finding practical applications of concepts and skills in daily living
How does the ability of light can be used to improve the hotel?
Most of us wear light-colored dress during summer time. How does the ability of material to block/transmit/absorb light applied?
We need to cover our head with hat or umbrella during summer time more especially at noon. Why?
How does the ability of material to block/transmit/absorb light applied shown?
Evaluation
Directions: Read the following situation. Tell what happen on the different materials when light falls. (transmit, block , absorb)
___1. Plastic bottle of mineral water
___2. Child sitting in the shade
___3. Eye glasses of your grandfather
___4. Magnifying glass used in an investigation
___5. Use jacket during cold weather
Week 5 Day 5
Ability of the materials to block, absorb or transmit light to its use
Data was based from Science Exemplar
by Science Writing Team
Batangas Province
PPT created by:
PRECILA R. UMALI
JZMES Santa Rosa City, Laguna
Establishing a purpose for the lesson
Directions: Tell what happen when light falls on different materials. Complete the graphic organizer.
Presenting examples/ instances of the lesson
1. Setting standards
2. Group the class into four.
3. Distribution of activity sheet.
4. Let the pupils perform the activity.
Group I – Young illustrators. Explain the importance of ability of the materials to block light to its use. Draw your answers.
Group II – Young actors/actresses. Explain the importance of ability of the materials to absorb light to its use. Present your answer through role play.
Group III – Young newscasters. Explain the importance of ability of the materials to transmit light to its use. Make a 2 - minute broadcasting.
Discussing new concepts and practicing new skills #
Group Reporting and Presentation of Output
Discussing new concepts and practicing new skills #2
Why is blocking of light important?
Why is absorbing of light important?
Why is transmitting of light important?
Developing mastery
What evidence shows that light was blocked by materials?
What evidence shows that light was transmitted by materials?
What evidence shows that light was absorbed by materials?
Making generalizations and abstractions about the lesson
What is the importance of ability of the materials to block, absorb or transmit light to its use?
Light is absorbed when it strikes on materials with dark colors and rough surfaces. Materials with dark colors absorb light that changes to heat. These materials are called heat absorbers. You can observe heat absorber clothing that people wear during winter or cold weather.
How lights interacts with different materials?��Visible light-the light that is visible to the human eye and responsible to our sense of sight.�Optics- is a scientific study of light and how it interacts with different objects.
Ways on how lights are transferred:�1. Refraction- refers to the bending of lights as it passes through a different material. �Ex. A straw in a glass of water appears bent because of the change in material that interacts with light. The part of the straw that is dipped in water interacts with the air while the part of the straw dippedin water interacts with water.The speed of light is faster in the air and slower in water.
�2.. Reflection-refers to the bouncing back of light when it hits the object. Some objects with flat surfaces, like mirrors reflect light in a straight predictable way, Some with uneven surface like rocks reflect light in a scattered way.
�
3. Absorption- refers to the material’s taking in of light and not reflecting it back. Ex. When light strikes a black surface, it is absorbed by the surface and noting reflected.
4. Transmission- refers to the passing of light trough some materials.�Ex. When light passes trough a glass window, it is transmitted to the another side, allowing the light to pass through the window.
�Remember: The speed of light travels in a vacuum is 229 792 458m/s or about 300 000km/s. It takes 8 minutes and 19 seconds for the sun’s light to reach the earth.
Evaluation
Direction: Read the following situation. Write the letter of the correct answer.
___1. You are walking one afternoon to go to your uncle’s house. You are aware that exposure to sunlight can lead to certain diseases. What material can you use in order to block the sun that damages your skin?
A. umbrella B. books
C. bag D. rain coat
__2. The following are examples of materials that transmit light. Which one is not useful?
A. picture frames
B. windows of houses
C. glass doors covered with designed plastic
D. display cabinet door
___3. Why do most people in tropical countries use white paint for their homes?
A. to shade their house
B. to absorb heat
C. to make feel cool and comfortable
D. to decrease the temperature
___4. Why is light absorbed by the plants useful?
A. It makes the plants green.
B. Over exposure of plant to light make plants die.
C. Light is reflected and increase its temperature.
D. It makes the environment cool.
__5. Why do people enjoy the shade of the tree during summer?
A. It reflects light.
B. It absorbs light.
C. It blocks light.
D. It transmit ligh.t
Additional activities for application or remediation
Describe the harmful effects of sunlight to people.
Identify which of the following objects is