1. Scale of the Universe

2. Do Now Answer the following questions based on the big bang movie 1.What evidence is there to support the Big Bang Theory? 2.What is happening to the size of the universe?

4. Objectives 1.Explain the Big Bang Theory and provide evidence to support it red blue 2.Explain the significance of red shift and blue shift 3.Arrange parts of the universe in order based on size

5. Big Bang Theory http://www.youtube.co m/watch?v=Rx05beJO ooE

6. The universe started as a single point ~10-20 bya That point was extremely dense It became unstable & exploded outward Universe is still expanding today What is the Big Bang Theory

8. Review of Electromagnetic Spectrum

9. Change in the wavelength of light emitted by an object due to its motion

12. Blueshift Wavelengths shorten What can this shift tell us about the movement of the star? –It is moving towards Earth

13. Redshift Wavelengths become longer What can this shift tell us about the movement of the star? –It is moving away from Earth

14. Elemental Emission Spectrums

15. What do the elements look like?? Emission & Absorption Spectrum

16. The greater the degree of shift of the spectral lines, the faster the object is moving away greater the degree greater the degree

19. Put these in order of size: galaxysolar systemuniverse universegalaxy solar system

20. Exit Questions Take out a piece of looseleaf. On the TOP of your paper please: 1.Put your name 2.Put the date 3.Your answer to the question

21. What is the best inference that can be made concerning the movements of Galaxies A, B, and C?