Grade 8 SCIENCE SY 2017-2018 Quarter: 1st
D. ACTIVITY Picture Analysis
Topic: Colors of Light
Date:
Properties and Characteristics of Light
Day:
I. OBJECTIVES: Given the necessary materials, at the end of the period, 75 % of the students will be able to; a. describe properties and characteristics of light b. explain the occurrence of spectacular events in the sky like rainbows, red sunset and blue sky. 3. infer that white light is made up of different colors of light.
II. SUBJECT MATTER: A. Topic: Topic: Properties and Characteristics of Light Subtopic: Refraction of Light-Dispersion Learning Competency Demonstrate the existence of the color components of visible light using a prism or diffraction grating;
B. MATERIALS Ppt presentation
C. REFERENCES Science learners module pp 91-99 Science Teachers Guide pp 57-60 www. Youtube .com/ refraction of Light www. Physics classroom.com
III. STRATEGIES A. DAILY ROUTINE Prayer, Attendance, Cleanliness of the room
B. REVIEW Characteristics and Properties of Sound Does not travel in a vacuu m
Velocit y
E. ANALYSIS
Wavel ength
Sound
Longit udinal
Reflect ion
Refrac tion
Questions? The pictures above show properties of light and how such property is being processed. 1. Can you tell the properties of light being exhibited? 2. How do light travels? 3. What kind of wave is light wave? 4. When it bounces off and bends what property is similar to sound wave? 5. What other properties of light are common to sound waves?
Frequency
C. MOTIVATION Introduce a character named Roy G. Biv. Ask students whether they are familiar with the character. Ask them also if there is a connection between the character and the lessons. Ask the students if they could guess some information or concept from the name of the character. 1. Why do we see spectacular events in the sky like rainbows, red sunset and blue sky? 2. How are refraction and dispersion demonstrated in light? 3. Among the different colors of light, which is bent the most and the least?
1. What are the different properties of light? 2. Why do we see spectacular events in the sky like rainbows, red sunset and blue sky? 3. How are refraction and dispersion demonstrated in light? 4. Among the different colors of light, which is bent the most and the least?
F. ABSTRACTION Properties of Light 1. REFLECTION- Light bounces off surface at same angle it hits. 2. REFRACTION- bending of waves when passing from one medium to another 3. DIFFRACTION- bending of waves around a barrier depends on the wavelength and size of the opening barrier 4. INTERFERENCE- When two waves meets, they have an effect with each other.
G. APPLICATION. APPLICATION. Light has gone all the way from a mere transfer of energy to the creation of colors for entertainment and other purposes. Most of our gadgets are light emitting for efficiency when used
at night. In the field of medicine light is used to cut through the skin for surgery as in laparoscopy. The health sciences are also using light for other medical purposes. But the most important purpose is for humans and other animals to see the beautiful world through light.
F. ASSESSMENT Read the questions carefully and write the letter of correct answer on your quiz notebook. 1. Electromagnetic waves are a. longitudinal. b. transverse. c. both longitudinal and transverse. d. None of the above. 2. What is the correct name for a glass or plastic shape that splits white light into the colors of the spectrum? a. block b. lens c. prism d. rainbow 3. Kate has a fish tank on her window sill. When she looks through it, the outside looks as if it has been moved sideways. This is because of a. absorption b. reflection c. refraction d solution 4. A rainbow formed on a compact disc, what property of light is exhibited? a. diffraction b. interference c. refraction d reflection 5. When you look at the mirror you see yourself, this is best explained by what property of light? a. diffraction b. interference c. refraction d reflection
IV. ASSIGNMENT Bring the ff. Materials Color Spectrum Wheel Pattern Cardboard or illustration board white screen button fastener glue or paste 1. What does the hierarchy of colors of light exhibit in terms of energy? 2. Which color of light has the greatest energy? Ref. pp.102-105 of Learners Module
1.Red versus violet...(Refractive index color of light) Students will analyze the table below and write observations.
Grade 8 SCIENCE SY 2017-2018 Quarter: 1st
Topic: Colors of Light
Date:
Hierarchy of Colors of Light
Day:
I. OBJECTIVES: Given the necessary materials, at the end of the period, 75 % of the students will be able to; a. infer that different colors of light emits energy. b. determine which color of light emits the least and the most energy. 3. observe that bending depends on the refractive index color of light
II. SUBJECT MATTER: A. Topic: Subtopic: Refraction of Light-Dispersion Learning Competency explain the hierarchy of colors in relation to energy; explain that red is the least bent and violet the most bent according to their wavelengths or frequencies;
B. MATERIALS activity sheet, video clip on refraction of light
C. REFERENCES Science learners module pp 91-99 Science Teachers Guide pp 57-60 www. Youtube .com/ refraction of Light www. Physics classroom.com http://www.scienceclarified.com
How would you relate the refractive index with the bending of the color of light? 2. Which color has the MOST energy?The color spectrum wheel revisited Students will do the following procedures. 1. Try out your Color Spectrum Wheel by positioning the innermost of the flaps on COLOR SPECTRUM. This will simultaneously position the other flaps to WAVELENGTH, FREQUENCY, and ENERGY. 2. Turn the upper wheel and observe the combinations. 3. Fill in the table below with the corresponding combinations you have observed using your Spectrum Color Wheel. Formulate questions that follow.
III. STRATEGIES A. DAILY ROUTINE Prayer, Attendance, Cleanliness of the room
B. REVIEW Relation of Wavelength and Frequency of Soundwaves Which do you think will have a higher and lower frequency?
C. MOTIVATION
What do you observe in the picture? What 3 colors of light would produce white light?
D. ACTIVITY Differentiated activity
E. ANALYSIS 1. How would you relate the refractive index with the bending of the color of light?
2. Which color registered the highest frequency? shortest wavelength? 3. Which color registered the lowest frequency? longest wavelength? 4. What did you observe about the wavelengths and frequencies of the different colors of light? 5. What did you observe about the products of frequencies and wavelengths? 6. Does the frequencies of the colors of light increase from Red to Violet 7. What did you observe about the corresponding energies from Red to Violet? 8. How is frequency relate to energy of colors of light? F. ABSTRACTION Light is a form of electromagnetic radiation: a form of energy carried by waves. The term "electromagnetic radiation" refers to a vast range of energy waves, including gamma rays, X rays, ultraviolet rays, visible light, infrared radiation, microwaves, radar, and radio waves. Of all these forms, only one can be detected by the human eye: visible light.. With the concept of dispersion, colors of light are hierarchically arranged as ROYGBIV according to frequency and energy of the colors of light. Red happens to have the lowest frequency and the least energy. Energy and frequency increases as one moves from red light towards violet light. This display of colors of lights by dispersion of white light is one of the consequences of refraction of light aside from the apparent depth mentioned above. Other consequences are spectacular phenomenon of blue skies and red sunsets.
G. APPLICATION. What colors do you see if you look inside a computer or TV Screen?
F. ASSESSMENT Read the questions carefully and write the letter of correct answer on your quiz notebook. 1. Which color has the MOST energy? a. red b. blue c. violet d. green 2. Which of the following lights has the highest frequency? a. red b. blue c. violet d. green 3. Which of the following lists the 6 colors of the visible spectrum from shortest to longest wavelength? a. Red, Orange, Yellow, Green, Blue, Violet b. Orange, Red, Yellow, Green, Blue, Violet c. Violet, Blue, Green, Yellow, Orange, Red d. Blue, Violet, Green, Yellow, Orange, Red 4. This type of electromagnetic wave has the most penetrating power: a. X-rays b. UV Rays c. Radio waves d. Infrared waves 5. What 3 colors of light would produce white light? a. Red, Orange & Yellow c. Red, Yellow & Green b. Red, Yellow & Blue d. Red, Green & Blue
IV. ASSIGNMENT What happens to solids, liquids, or gases when they absorb or release heat? Does heat affect all kinds of materials in the same way? Are heat and temperature one and the same?
