2-8

**Cosmic Voyage** <---Previous Assignment - Next Unit--->media type="custom" key="6581711" **__Time Length__**
 * 1 Day


 * __Instructions__ **
 * //Make a new page on your wiki titled "2-8 Cosmic Voyage."//
 * //Copy the questions to your page, and answer them there.//

// ** __Video__ ** // If a bar pops up on this screen click it and then run the add-on. Double click the video when playing to make it full screen or hit Control and Plus at the same time till it is the size you want. Press and hold the forward button to fast forward.
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1. What is the simple scale we use everyday to determine what is large and small? 2. What did most people assume was the center of the unchanging universe? 3. What did Galileo see on the moon with his telescope? 4. What is represented by each of these following circle sizes? 1 meter = 1000 meters or 1 kilometer = 6 powers of 10 (1 x 10 6 meters) = 8 powers of 10 (1 x 10 8 meters) = 13 powers of 10 (1 x 10 13 meters) = 5. What is a light year? 6. How many years would traveling to the nearest star take? 7. What did Anton van Leeuwenhoek invent? 8. What is one of the two particles inside the nucleus of an atom? 9. How long would the collision of two galaxies really last? 10. What is the name for exploding stars? 11. What is the bacteria that is thought to have first produced oxygen called? 12. Why are black holes called “black holes”?
 * __Worksheet__ **