Quarter 3 Lesson 1 in Science Grade 9.pptx

PPT

1. STAR

2. CLOUDS OF GAS AND DUST

3. FORMATION FORMATION

4. STAR FORMATION

5. OUR LEARNING OBJECTIVES: 1. Understand how stars form; 2. Describe how star changes in time; and 3. Share the importance of stars

6. STAR FORMATION

7. STAGE 1

8. STAGE 1 Star formation takes place in swirling clouds of gas and dust that are many times larger than a typical Solar System.

9. STAGE 2

10. STAGE 2 Over time, a region within the star becomes denser than its surroundings. At this point, gravity kicks in and the cloud starts to collapse in on itself.

11. STAGE 3

12. STAGE 3 As the cloud shrinks, its centre (or core) becomes very hot and dense. The cloud will start to spin a little as it collapses, forming a disk.

13. STAGE 4

14. STAGE 4 Eventually, the star's core becomes so hot and dense that nuclear fusion begins. This is the actual birth of the star.

15. STAGE 5

16. STAGE 5 The light, heat and particles produced by the new star blow away most of the remaining cloud.

17. STAGE 6

18. STAGE 6 The star is left alone in space to slowly use up its nuclear fuel. After several million or billions years, it runs out of fuel and goes through the final stages of its life.

19. WHY DO YOU THINK STAR IS IMPORTANT IN OUR LIFE?

20. ACTIVITY 1 IN 1 WHOLE SHEET OF PAPER, CREATE A DIAGRAM THAT SHOWS HOW STAR FORMS.

21. Assignment 1. ON A CLEAR NIGHT SKY, LOOK AT THE STARS FROM 7 PM TO 11 PM. 2. FOCUS ON ONE PARTICULAR STAR. 3. LOOK AT THE STARS EVERY HOUR

22. QUESTIONS: 1. Compare the position of stars in the sky. What do you notice? 2. Are the stars visible at 7 pm still visible at 11 pm in their “original position”? Why is this so? 3. How do the stars move? Describe the movement of the stars in the night sky. 4. How is the motion of the stars similar to the motion of the sun?