1. Quiz: To Earn ½ Points Back: On another sheet of paper: 1. Write the correct answer and explain WHY this is the correct answer. OR 2. Give another example of the same kind of thing (or expand on the info.).

2. 10/19 Doppler Effect Warmup: 1. Draw: Draw and label 2 waves, one high frequency and one low frequency. 2. Discuss: What does a train whistle or car horn sound like as it approaches then moves past? Today 1. The Doppler Effect: Demo, Discussion, Videos 2. Quiz back, grades 3. Current Event ALSO: Tape in pictures from Friday

3. Friday

4. sound

5. The Doppler Effect Tone Generator

6. Frog on a moving lily pad

7. the doppler effect

8. The Doppler Effect Video: The Doppler Effect (1:56)

9. The Doppler Effect What does the Doppler effect have to do with stars?

10. color & wavelength wavelength in nanometres 700650600550500400 redyelloworangegreenblueindigoviolet

11. emission spectra hydrogen helium white light neon

12. red-shift blue shift laboratory spectrum of sodium red shift blue shift RED BLUE

13. red-shift blue shift laboratory spectrum of sodium red shift blue shift RED BLUE

14. red-shift blue-shift

17. Summary Notes on the Doppler Effect 3-minute Quick Write 3-minute Quick Write Video: Red Shift (2:15)

18. Edwin Hubble, 1920’s. If all galaxies are receding, the logical conclusion is the universe is expanding. If all galaxies are receding, the logical conclusion is the universe is expanding. If the universe is expanding, what if we run time backwards? If the universe is expanding, what if we run time backwards? Universe would have been smaller, more dense… infinitely so? Universe would have been smaller, more dense… infinitely so? Two conflicting theories of Universe origins: 1. Steady State 2. The Big Bang

19. 10/20/09 The Big Bang Theory SUBSTITUTE (workshop) 1. (10 minutes) 2 Videos (on flash drive): Universe is Expanding (Bill Nye, 2:53) Universe is Expanding (Bill Nye, 2:53) The Big Bang Theory (3:00) The Big Bang Theory (3:00) 2. (30 minutes) Students take Cornell note on article: “How the Big Bang Theory Works” CS: 1st 2 pages Honors: As far as possible. 2. (5 minutes) Video: The Big Bang (3:58)

20. Review article from yesterday What did you learn? What did you learn? What questions do you have? What questions do you have?

21. 10/21/09 The Big Bang Theory SUBSTITUTE (sick) Show BBC Big Bang video

22. 10/22 TEST REVIEW Warmup: 1. Turn in Current Event 2. Mark your notes from the last 2 days:  = most interesting thing Circle = helped me understand Big Bang ? = I’d still like to know more Today 1. Big Bang Review 2. Unit Review for Test

23. Explore questions… http://curious.astro.cornell.edu/cosmology.php

24. The Big Bang Theory The Big Bang Theory Warmup: Explain the spectrum: Today Discussion & Video: “Back to the Beginning”

25. Doppler Shift blue-shifted object –moving towards red-shifted object moving away

27. The Balloon Analogy

28. The Raisin Bread Analogy

29. Big Bang Theory Honors CS Video: BBC video on Steady State (Hoyle) vs Big Bang (Gamov) Video: BBC video on Steady State (Hoyle) vs Big Bang (Gamov)

30. Big Bang Theory Models of the Universe Models of the Universe pages from Big Bang book (S.Singh) p. 68-69 Earth vs. Sun-Centered p. 370-371 BigBang vs Steady State

31. Big Bang Theory Video: Back to the Beginning (portion) Video: Back to the Beginning (portion)

32. Three important observations 1.The expansion of the Universe.  Hubble: galaxies are receding. 1st evidence 2. The abundance of light elements (H, He, Li)  B.Bang theory predicts these elements should have been fused from protons and neutrons in the first few minutes after the Big Bang. 3. Cosmic Microwave Background (CMB) Radiation The early universe should have been very hot. The CMB radiation is the remnant heat leftover from the Big Bang. The early universe should have been very hot. The CMB radiation is the remnant heat leftover from the Big Bang.

33. Cosmic Microwave Background

34. Big Bang Timeline We are here

35. Common Misconceptions The Big Bang was an explosion. The Big Bang was an explosion. The universe began as a point. The universe began as a point. The universe is expanding into “something” and we are at the center of the expansion. The universe is expanding into “something” and we are at the center of the expansion. Galaxies are “flying away” in space. Galaxies are “flying away” in space.

36. Predictions of a Big Bang Universe Every point is receding away from every other point. Every point seems to be at the center of an expanding universe. Every point is receding away from every other point. Every point seems to be at the center of an expanding universe. The farther away something is, the faster it is receding (unlike an explosion). The farther away something is, the faster it is receding (unlike an explosion). Farther away  looks redder (Doppler effect) Farther away  looks redder (Doppler effect) Relationship is linear: twice as far  receding twice as fast. Relationship is linear: twice as far  receding twice as fast. I: Hubble’s Law

37. Big Bang websites For 2 students (& others?) For 2 students (& others?) http://www.astro.ucla.edu/~wright/doppler.htm http://www.astro.ucla.edu/~wright/doppler.htm http://www.astro.ucla.edu/~wright/doppler.htm http://science.howstuffworks.com/big-bang-theory.htm http://science.howstuffworks.com/big-bang-theory.htm http://science.howstuffworks.com/big-bang-theory.htm “print” button -- this and next few pages “print” button -- this and next few pages http://map.gsfc.nasa.gov/universe/bb_concepts.html http://map.gsfc.nasa.gov/universe/bb_concepts.html http://map.gsfc.nasa.gov/universe/bb_concepts.html http://map.gsfc.nasa.gov/universe/WMAP_Universe.pdf http://map.gsfc.nasa.gov/universe/WMAP_Universe.pdf http://map.gsfc.nasa.gov/universe/WMAP_Universe.pdf http://cosmology.berkeley.edu/Education/IUP/Big_Bang_Primer.html http://cosmology.berkeley.edu/Education/IUP/Big_Bang_Primer.html http://cosmology.berkeley.edu/Education/IUP/Big_Bang_Primer.html http://curious.astro.cornell.edu/cosmology.php http://curious.astro.cornell.edu/cosmology.php http://curious.astro.cornell.edu/cosmology.php Have students spend ~30 minutes reading through the questions. Write (1) new understandings (2) new questions Have students spend ~30 minutes reading through the questions. Write (1) new understandings (2) new questions http://www.amtp.cam.ac.uk/user/gr/public/bb_home.html http://www.amtp.cam.ac.uk/user/gr/public/bb_home.html http://www.amtp.cam.ac.uk/user/gr/public/bb_home.html http://curious.astro.cornell.edu/cosmology.php http://curious.astro.cornell.edu/cosmology.php http://curious.astro.cornell.edu/cosmology.php http://www.umich.edu/~gs265/bigbang.htm http://www.umich.edu/~gs265/bigbang.htm http://www.umich.edu/~gs265/bigbang.htm