DEMONSTRATION TEACHING - SCIENCE 10 - PPT
- 1. OBJECTIVE: AT THE END OF THE LESSON, STUDENTS WILL BE ABLE TO: DESCRIBE THE CHARACTERISTICS OF STARS.
- 3. INSTRUCTION: 1.EACH OF YOUR CHAIR IS PASTED WITH A STAR. (YELLOW, BLUE AND RED) 2.GET YOUR STAR AND RAISE IT UP. 3.THE COLOR OF STAR YOU HAVE WILL IDENTIFY YOUR GROUP. 4. TASK: DESCRIBE THE STAR BASED ON THE CHARACTERISTICS THAT WILL BE ASSIGNED TO THE GROUP.
- 4. GROUP’S TASK: YELLOW STARS (IN A FORM OF SINGING) COLOR & TEMPERATURE OF STARS RED STARS (IN A FORM OF A POETRY) DISTANCE & BRIGHTNESS OF STARS BLUE STARS (IN A FORM OF DRAWING) SIZES OF STARS
- 5. 6. ALLOTTED TIME OF 5 MINUTES IS GIVEN FOR EVERY GROUP TO FINISH THE TASK. 7. MATERIALS ARE PROVIDED BY THE TEACHER (MARKER, MANILA PAPER, SCOTCH TAPE & HANDOUT – ALL ARE FOUND INSIDE THE BROWN ENVELOPE).
- 6. 8. GROUPS WILL BE GUIDED W/ THE FF. RULES IN DOING THE TASK. MERIT OF ONE(1) GOLD STAR WILL BE GIVEN TO THE GROUP WHO WILL DEMONSTRATE THE FF. BEHAVIOR: PARTICIPATIVE GROUP WELL – BEHAVE GROUP TIME – ON TASK GROUP
- 7. DEMERIT OF ONE(1) RED STAR WILL BE GIVEN TO THE GROUP WHO WILL COMMIT THE FF: - OTHER MEMBERS ARE NOT PARTICIPATING - NOISY GROUP - DID NOT MEET THE ALLOTTED TIME TO FINISH THE TASK
- 8. 9. AS A REWARD, THOSE WHO WILL BE ABLE TO COLLECT GOLD STARS WILL EXCHANGED IT LATER ON TO A BISCUITS, CANDIES OR CHOCOLATES. 10. RATING OF GROUP OUTPUT WILL BE GIVEN BY THE GROUP OBSERVER (E.G. GROUP 1 WILL BE RATED BY GROUP 2 AND SO ON). - MAXIMUM OF 3 AND 2 CAN BE GIVEN BY THE RATER.
- 9. LEGEND: 1 = 5 POINTS 1 = MINUS 3 POINTS TEACHER RATING TO THE GROUP: NEEDS IMPROVEMENT VERY GOOD
- 12. A STAR IS A HUGE BALL OF GAS.IT APPEARS ONLY LIKE A TINY DOT IN THE SKY BECAUSE OF ITS GREAT DISTANCE FROM EARTH. FORMED MOSTLY FROM ELEMENT HYDROGEN WHICH IS CONVERTED TO HELIUM THROUGH A THERMONUCLEAR REACTION CALLED FUSION. IT APPEARS TO CHANGE IN COLOR & BRIGHTNESS BECAUSE THE AIR ABOVE THE EARTH’S SURFACE IS ALWAYS IN MOTION & THE LAYERS OF THE ATMOSPHERE HAVE DIFFERENT DENSITIES. THESE MAKE STARS TWINKLE. WHAT IS A STAR?
- 13. ONLY 2500 TO 3000 STARS CAN BE SEEN WITH THE UNAIDED EYE AT ANY TIME. THESE STARS VARY IN BRIGHTNESS DEPENDING ON THEIR SIZE, TEMPERATURE, AND DISTANCE FROM EARTH. HOW MANY STARS ARE THERE IN THE SKY?
- 14. THE SUN IS AN AVERAGE STAR; IT’S NOT HOT OR COOL; IT'S NOT LARGE OR SMALL. THE SUN IS LARGER THAN 95% OF THE STARS.
- 15. WHAT ARE THE SIZES OF STARS? Dwarf Star Yellow Dwarf Giant Star Super Giant Star
- 16. Some of the Known Stars and their Sizes Relative to Each Other Betelguese red supergiant Antares red supergiant Pegasus red giant Rigel blue-white supergiant Aldebaran red giant Sun yellow dwarf
- 17. Why do stars vary in color and temperature? STAR RANGES IN COLOR FROM RED,ORANGE,YELLOW, WHITE & BLUE. STAR RANGES IN TEMPERATURE FROM 2000°C TO 5000°C. COLOR & TEMPERATURE ARE RELATED.
- 19. A LIGHT – YEAR IS THE DISTANCE TRAVELED BY LIGHT (AT SPEED OF 300,000 KM/S) FOR A PERIOD OF ONE YEAR. LIGHT TRAVELS ABOUT 9 TRILLION KM. IN ONE YEAR. How do we measure the distance of stars from Earth?
- 21. BRIGHTNESS IS RELATED TO THE DISTANCE FROM THE EARTH AND THE AGE OF STAR. 1ST MAGNITUDE STARS (BRIGHTEST) 6TH MAGNITUDE STARS (WEAKEST)
- 22. THE MAGNITUDE OF STARS MEASURES BRIGHTNESS. APPARENT MAGNITUDE – THE BRIGHTNESS OF STARS AS IT APPEARS TO US. ABSOLUTE MAGNITUDE – THE ACTUAL BRIGHTNESS GIVEN OFF BY A STAR AT A STANDARD DISTANCE.
- 23. TEN BRIGHTEST STARS NAME OF STAR APPARENT VISUAL MAGNITUDE DISTANCE FROM EARTH Sirius - 1. 47 8.6 Canopus - 0.72 310 Arcturus - 0.04 37 Alpha Centauri A - 0. 01 4.4 Vega 0. 03 28.5 Rigel 0. 12 770 Procyon 0. 34 11 Achernar 0. 50 140 Betelguese 0. 58 430 Agena 0.6 530
- 24. MY GUIDING STAR… Share your opinion on the following questions below. Start your statement by saying I BELIEVE ______________________________________ Q1: What is the effect of the presence and absence of stars to man’s daily life or living? Q2: In your life experiences, what moment do you consider you shine the brightest ? Explain.
- 25. Checking your Understanding HOW IS THE COLOR OF THE STAR RELATED TO ITS TEMPERATURE? ANSWER: the color of stars depend on its temperature, from red to orange(cool stars), to yellow and white (hotter stars) to blue (very hot stars). HOW DO DISTANCES OF STARS EXPRESS? ANSWER: distance of stars are expressed in LIGHT – YEARS.
- 26. Checking your Understanding HOW DO STARS DIFFER? ANSWER: stars differ in their properties such as color,size, distance, brightness and temperature. HOW MANY VISIBLE STARS ARE THERE IN THE NIGHT SKY? ANSWER: there are about 2500 to 3000 stars that are visible in the sky at night.
- 27. QUIZ TIME! A. Direction: Answer the following question. Write only the letter of the correct answer. Do it in ¼ sheet of paper. 1. Why do stars have color? a. It is because of the presence of oxygen. c. It is because of varied temperatures. b. It is because of the presence of carbon dioxide. d. it is because of the different locations. 2. The brightest stars are classified as ____________________. a. Red supergiant stars b. yellow dwarf c. First - magnitude stars d. bluish – white stars 3. In terms of color “sun” is classified as ___________________. a. Red giant b. yellow dwarf c. Orange d. red supergiant 4. The apparent magnitude of a star is a measure of its _______________________. a. Surface temperature and composition c. Distance from Earth b. Brightness as it appears from Earth d. Position on the H-
- 28. ASSIGNMENT Direction: Observe the sky tonight. Study the patterns of stars you see in the sky. Draw it in a short bond paper. Then answer the questions that follow. 1. How do stars arrange based on your observation? 2. What pattern of stars do you often see? 3. What colors of stars do you usually see?