30-4 study guide
Name:
Label and add to the diagram to illustrate the timeline of the big bang. (text book page 864)
1. Study the 30-4 vocabulary terms and definitions.
2. What are Ripples? What part of the big bang theory do they support? How do they support the theory?
3. What is cosmic background radiation? What part of the big bang theory does it support? How does it
support the theory?
4. What is red shift? What part of the big bang theory does it support? How does it support the theory?
5. What is meant by visible or normal matter? What percentage of the universe is made up of normal
matter?
6. Why do scientists think dark matter and dark energy are real? Use Newton’s laws to support your
answer.
7. Define light year. How far is one light year?
8. How fast does light energy travel (what is the speed of light)?
9. The star Rigel is 680 light years away from Earth. How long does it take the light from this star to reach
us? Explain your answer or show your work.
10. If the star Betelgeuse is 4.04 quadrillion (that is 404 followed by 13 zeros) kilometers away from Earth,
how many light years is that? Explain your answer or show your work.