PHY 580 - ASTROBIOLOGY FOR TEACHERS


ADDITIONAL QUESTIONS FROM THE READING


Chapter #1 The Search for life in the Universe

1. Describe the timeline for life on Earth. For how long were single celled organisms the only form of life? When did substantially more complex life forms first appear? (pages 4-5)

2. According to Jakosky, which planets in our Solar System appear to be the most likely places to find life? What is the environmental requirement that is met on these planets that make them the most likely locations for life? (Page 5)

3. How old is our current estimate for the age of the Universe? Describe how this estimated for the age for the Universe was calculated. (page 9)

4. What causes the expansion of the Universe to slow down? (page 10)

5. At the instant the big bang occurred, what was the Universe composed of? (page 10)

6. What is the three-Kelvin microwave background radiation? (page 10)

7. How were the heavy elements that the Earth and all living matter are made of created? (page 13)

8. How long after the big bang occurred, did our Sun form? (page 13)

9. Describe the process that occurred that formed our Solar System. (page 13)

10. Describe how and why the elemental composition Jupiter and the other gas giants is different from the composition of Earth and the other terrestrial planets. (page 14)

11. How long does it take the light from the Sun to reach the Earth? How long is the distance this light travels in light years, in km and in AU? (page 15)

12. What is the name of the nearest star to our Solar System? How long will it take light from this star to reach the Earth? How far will this light have traveled in light years, in km and in AU? (page 15)

13. How long will it take light from one side of the Milky Way galaxy to reach the opposite side of the galaxy? How far will this light have traveled in light years, in km and in AU? (page 15)


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