1. Review game Students break into teams of 4 Each team will discuss and answer each question Scoring sheets are handed in at the end. 5 points to winning team 4 points for 2 nd 3 points 3 rd 2 points 4 th 1 point for 5 th 0 for 6th

2. 1- What is the currently most accepted theory that describes the formation of the universe? Big bang theory

3. 2- What type of galaxy is the milky way? Spiral galaxy

4. 3- How long a star lasts is dependent only on its ____________ Mass

5. 4- What are stars classified by? Size, brightness, and temperature

6. 5- The hottest stars are what color? Blue-white

7. 6- When a star has used up all of its hydrogen it will turn into what? Red giant

8. 7- How are all galaxies moving in relation to every other galaxy? Away from each other

9. 8- All the different types of electromagnetic waves are know as what? Electromagnetic spectrum

10. 9- What is the name of the force that pulls the matter in stars together? gravity

11. 10- The distance light can travel in one year is known as what? Light year

12. 11- What type of galaxy has almost no gas or dust? Elliptical galaxies

13. 12-How old is the universe? 14 to 15 billion years old

14. 13- What types of telescopes gather and focus visible light? Reflecting and refracting telescopes

15. 14- How do astronomers determine the chemical composition of a star? A spectrograph

16. 15- A nebula is the place where _____________________ a star begins its life

17. 16- A star more than 40 times the mass of the sun will end its life as a what? A black hole

18. 17- A star is born when what starts to occur? Nuclear fusion

19. 18- When a star has a slight back and forth motion, it is an indication of what? That it has a planet

20. 19- When our solar system formed, the planets that lost most of their gases became the what? The rocky inner planets

21. 20- Determining the temperature of a star is aided by using a what? A spectrograph

22. 21- Binary stars that become dimmer at regular intervals are called what? Eclipsing binary stars

23. 22- Parallax is a method used to measure what? The distance to nearby stars

24. 23- What does the brightness of a star depend on? Size and temperature

25. 24- Main sequence stars show that they increase in brightness as they increase in temperature on what kind of diagram? Hertzsprung-Russel diagram