GRADE 9 QUARTER 3: Introduction to Astronomy.pptx

RELATED TO CONSTELLATION TOPIC FOR GRADE 9

1. Near Earth Objects Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the gravitational attraction of nearby planets into orbits that allow them to enter the Earth’s neighborhood. 

2. Near Earth Objects Comets Meteor Asteroids

3. COMETS Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices. They range from a few miles to tens of miles wide, but as they orbit closer to the Sun, they heat up and spew gases and dust into a glowing head that can be larger than a planet.

4. Meteor A meteor is  a space rock that enters earth's atmosphere causing a streak of light to appear in the sky . These are sometimes referred to as shooting stars .

5. Asteroids Asteroids  are small, rocky objects that orbit the Sun. Although  asteroids  orbit the Sun like planets, they are much smaller than planets.

6. Zodiac Sign

7. Sharon Cuneta MEGASTAR

8. Nora Aunor SUPER STAR

9. Vilma Santos STAR FOR ALL SEASON

10. Introduction to Astronomy: Stars

11. What is Astronomy? Astronomy is the study of anything we see in the sky, and beyond

12. Astrology Astrology consists of a number of belief systems that hold that there is a relationship between astronomical phenomena and events or descriptions of personality in the human world. Astrology has been rejected by the scientific community as having no explanatory power for describing the universe.

13. Stars Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements. Every star has its own life cycle, ranging from a few million to trillions of years, and its properties change as it ages.

14. Pre-assessment Choose the letter of the best answer. For numbers 1 to 3, use the table below that presents information about stars A, B, C, and D. 1.Which star is the hottest? A. A B. B C. C D. D Star Color A Red B Yellow C White D Blue

15. 2.Which star is very similar to our sun? A. A B. B C. C D. D 3. Which is the coolest star? A. A B. B C. C D. D 4. How do stars appear to move in the night sky? A. From East to West C. From West to East B. North to South D. From South to North Pre-assessment Star Color A Red B Yellow C White D Blue

16. 5. Stars appear to move in the sky because A. The earth is rotating on its axis. B. The universe is expanding. C. The night sky is rotating. D. New galaxies are formed. 6. If you are located at the North Pole, where will you see the Polaris? A. Overheard B. Just above the horizon C. Around 45 ͦfrom the horizon D. Polaris will not be seen in the North Pole. Pre-assessment

17. 7. Which constellation is prominently seen in the sky during summer? A. Orion C. Hercules B. Pegasus D. Virgo 8. Based on apparent magnitude, which of the following stars is the brightest? A. Alpha Centauri C. Rigel B. Betelguese D. Sirius Pre-assessment

18. 9. Why do stars have colors? A. It is because of the presence of oxygen. B. It is because of the presence of carbon dioxide. C. It is because of varied temperatures. D. It is because of the different locations. 10. Stars can be found in large groups throughout the universe. What are these groups called? A. solar system C. constellations B. comets D. asteroids Pre-assessment

19. Characteristics of Stars Color and Temperature Size Brightness

20. Color Vary in color Blue Yellow Red