This is the presentation that will be presented on Monday November 23rd 2009. It follows directly from the McDougal Littell: Space Science text.

1. the universe is expanding Space Science- Chapter 4: Section 4.4

2. The Story of Everything By: Neal Layton

3. How did the Universe begin? The Big Bang Theory

4. The Big Bang Theory Movement in time when the universe started to expand out of an extremely hot and dense state It is estimated that in 1 second the universe expanded from the size of a speck of dust to the size of our solar system

5. After the Big Bang the universe was very dense and hot Energy and matter behaved differently because of the extreme conditions We do not fully understand what the conditions were like in the early universe

6. Development of the Universe Earliest stage of development happened in fractions of a second Took 300,00 years for the first elements to form Stars, planets and galaxies began to appear within the next billion years

7. Review: What is a galaxy? All space, energy and matter

8. Using your marker draw a galaxy on a balloon Draw either an irregular, spiral or elliptical galaxy Measure the length and width of the galaxy using a ruler Blow up your balloon and tie it Measure the length and width again. What happened to your galaxy? The galaxy is expanding!

9. Movement of Galaxies How do we know that the galaxies are moving? Hint: The light from the galaxy is either compressing or stretching out Astronomers use the Electromagnetic Spectrum and the Doppler Effect

10. Review: What is the Electromagnetic Spectrum? Energy that travels across a distance as certain types of waves

11. What is the Doppler Effect? Listen! This is a car horn at 30/mph http://www.physics.ucla.edu/demoweb/demomanual/acoustics/effects_of_sound/30_MPH_doppler.au change in the observed wavelength or frequency of a wave that occurs when the source of the wave or the observer is moving

12. Galaxies that are moving towards Earth emit blue light because the waves are more compressed Galaxies that are moving away from Earth emit red light because the waves are stretched out

13. Galaxies Moving A: Galaxy and Earth moving towards each other B: Galaxy moving away from Earth C: Galaxy moving towards Earth