1. Developed by: Jill Swanger for 2nd graders
STARS
Sizes, Brightness, Patterns
Developed by: Jill Swanger
for 2nd graders

2. (Star Wars theme song playing from CD in background)
Table of Contents
(Star Wars theme song playing from CD in background)
Title Slide
Georgia Performance Standard
Definition of a Star
Elements of a Star (Pie Chart)
Physical Attributes (Flow Chart)
Brightness of a Star (Organization Table)
Sizes of a Star
Life Cycle of a Star
Patterns of a Star (Bar Graph)
Video Clip of the Sun
Conclusion
Glossary
References

3. Georgia Performance Standard
2nd Grade Science Standard
Earth Science
S2E1: Students will understand that stars have different sizes, brightness, and patterns.
a. Describe the physical attributes of stars – sizes, brightness, and patterns.

4. What is a star?
A gaseous sphere found in outer space. A star is held together by its own gravitation. It emits light through its source of nuclear energy.

5. Elements of a Star

6. Physical Attributes of Stars

7. What causes a star’s brightness?
Hhhmmm!
I wonder which 2 factors?
Take a look at the table on the following slide. Determine what 2 main factors influence the brightness of a star (as seen from Earth)!

8. Brightness 1 2 3 4 5 5 Brightest Stars Sirius Canopus Alpha Centauri A
Rank
Star
Brightness
Distance from Earth
Location 1
Sirius
23 x more luminous than sun
8.5 light years
Constellation Canis Major 2
Canopus
14,000 x more luminous than sun
316 light years
Constellation
Carina 3
Alpha Centauri A
1.5 x more luminous than sun
4.3 light years
Alpha Centauri System 4
Arcturus
215 x more luminous than sun
37 light years
Beside Ursa Major 5
Vega
54 x more luminous than sun
25 light years
Lyra

9. What are the 2 main factors?
Did you think about it?
What are the 2 main factors?
Distance from the Earth
Luminosity (compared to the Sun)

10. Physical Attributes of Stars

11. Are all stars the same size?
Sizes
Are all stars the same size?

12. Sizes…(continued)
What do you notice about all of these stars below?

13. Sizes…(continued) Tell me two types of sizes stars can have.
Let’s put them on our physical attributes chart!

14. Physical Attributes of Stars

15. Life Cycle of Stars Sun-like Stars (1.5 X mass of sun) Red Giant
Stellar
Nursery
Planetary
Nebula
Black
Dwarf
White
Dwarf

16. Life Cycle of Stars…(continued)

17. What patterns can stars create?

18. Constellations
Stars can form patterns in the sky known as constellations.
Who can tell me the name of a constellation?
This constellation is Orion (the hunter).

19. Orion

20. How many stars does it take to make a pattern?

21. KidsAstronomy.com - Earth
The night sky
What constellations are in the sky right now?
KidsAstronomy.com - Earth

22. Physical Attributes of Stars

23. What is the sun? Did you know that the sun is a large star?
Check out this video on the sun!

24. Conclusion What are the 3 physical attributes of a star?
Tonight, look at the sky and write down what you see!

25. Glossary
attributes: characteristics
luminous: brightness

26. References
Arkansas/Oklahoma Astronomical Society. (2005). Retrieved July 23, 2005, from
Constellations and Their Stars. (n.d.). Retrieved July 19, 2005, from
Enchanted Learning. ( ). Retrieved July 21, 2005, from
Georgia Department of Education. (2005). Retrieved July 18, 2005, from
Imaginova Corp. (2005). Retrieved July 20, 2005, from
Kid Astronomy. ( ). Retrieved July 20, 2005, from

27. References…(continued)
NASA Goddard Space Flight Center. (n.d.). Retrieved July 20, from
Nikomi (2005). Retrieved July 21, 2005, from
Solar Views. ( ). Retrieved July 21, 2005,. From
Yahoo, Inc. (2005). Retrieved July 18, 2005, from