Download Standard 1-1.A “The Big Bang Theory” Study Notes

Standard 1-1.A “The Big Bang Theory” Study Notes
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Light from stars support the Big Bang Theory because it shows that most
objects in space are moving away from one another.
2. The spectrum of hydrogen on a distant star is red shifted.
3. Stars farthest from Earth with the greatest speed have the greatest red shift.
4. Scientists accept the Big Bang theory because evidence supports it.
5. The big bang started when all matter in the universe burst from a tiny point.
6. A star moving away from Earth has a spectrum that is shifted toward red.
7. Hubble’s discovery that there was red shift in the spectra of galaxies led to an
understanding that the universe is expanding.
8. Astronomers believe that cosmic background radiation formed shortly after
the big bang.
9. The event which began the universe was the big bang.
10. The two elements that formed in the big bang are hydrogen and helium.
11. Scientific explanation for the origin of the universe relies on evidence from
starlight and other types of radiation.
12. Technology helped Hubble make his discovery by using telescopes that
collected accurate data from space.
13. Cosmic Microwave Background Radiation supports the Big Bang theory
because it is energy left behind from the Big Bang explosion in the form of
radiation.
14. Much of the evidence for the Big Bang theory depends on understanding the
data gathered with technology.
15. The time it takes for half of a sample of a radioactive isotope to decay is called a Half-life.
16. Radioactive dating is used to determine the absolute age of rocks because
radioactive decay happens at a relatively constant rate.
17. Radiometric dating is determining the age of a substance by comparison of the
ratio of parent to daughter isotopes is.
18. In radiometric dating scientists compare the proportion of a radioactive parent
isotope to a stable daughter isotope.
19. The atoms in a star become heavier each time it goes through a life stage.
20. A star produces all the heavier atoms found in the universe when it undergoes
a “nova” or “supernova” explosion.
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