Chapter 23: The Beginning of Time
Basic Skills/Definitions Quiz

1 .       Based on our current understanding of physics, it would seem that we can understand the conditions that prevailed in the early universe as far back in time as ______. [Hint]

2 .       What happens when a particle of matter meets its corresponding antiparticle of antimatter? [Hint]

3 .       What is the significance of the Planck time? [Hint]

4 .       The four fundamental forces that operate in the universe today are: [Hint]

5 .       A "GUT" (grand unified theory) refers to theories that ______. [Hint]

6 .       What do we mean by inflation? [Hint]

7 .       Of the statements below, which one correctly summarizes the events in the early universe according to the Big Bang theory? [Hint]

8 .       Which statement about the cosmic microwave background is NOT true? [Hint]

9 .       The Big Bang theory is supported by two major lines of evidence that alternative models have not successfully explained. What are they? [Hint]

10 .       Measuring the amount of deuterium in the universe allows us to set a limit on _______. [Hint]

11 .       Based on the Big Bang theory, what do observations of the cosmic microwave background and of chemical abundances in the universe suggest about dark matter? [Hint]

12 .       Which of the following observations cannot be explained by the Big Bang theory UNLESS we assume that an episode of inflation occurred? [Hint]

13 .       The idea of inflation makes one clear prediction that, until quite recently, seemed to contradict the available observations. What is this prediction? [Hint]

14 .       Olber's Paradox is an apparently simple question, but its resolution suggests that the universe is finite in age. What is the question? [Hint]

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