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Key Theories of the Universe Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. The best theories predict that our universe is likely:

Question 2 2. The inflation of our universe occurred when:

Question 3 3. This is a fundamental principle and assumption of cosmology which says that on a large scale the universe is both homogenous and isotropic:

Question 4 4. Which universe model is shaped like a sphere?

Question 5 5. The first seconds of our universe were filled namely with:

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Question 6 6. This is an infinite and uncurved space-time model of the universe:

Question 7 7. The part of the universe we can see from our location in space is known as the:

Question 8 8. The majority of our universe's density is made of:

Question 9 9. Neutrinos are a kind of:

Question 10 10. What do we expect will happen to our universe if the cosmological constant is the form of our dark energy?

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Question 11 11. Since the universe isn't infinitely old, this helps explain why the sky is dark at night. Simply put, it's dark because:

Question 12 12. The radiation that fills up all of space as a result of the Big Bang is known as:

Question 13 13. A positron is:

Question 14 14. Our solar system is:

Question 15 15. Our cosmic light horizon's radius is estimated to be:

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Question 16 16. We expect that as the universe expanded since the Big Bang, gamma ray photons present in the beginning would have ___with time:

Question 17 17. The theory that's most likely correct about the origins of our universe is:

Question 18 18. The interesting notion that the early universe had just the right amount of matter to match critical density is known as the:

Question 19 19. Cold dark matter ___hot dark matter:

Question 20 20. The edge of our observable universe is known as the:

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Question 21 21. If dark energy reverses direction, we can expect a:

Question 22 22. Our universe is approximately how old?

Question 23 23. Black holes, white dwarfs, and brown dwarfs are all considered to be:

Question 24 24. The universe is mainly made of:

Question 25 25. The principle of ________ tells us that there are no special locations in the universe:

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Question 26 26. The time when the universe became transparent to light, allowing it to travel for great distances, is known as the:

Question 27 27. This is a version of the big bang theory that accounts for the very rapid expansion of our early universe:

Question 28 28. The most likely form dark energy takes now is likely governed by the:

Question 29 29. The reason the universe eventually became transparent to light is because:

Question 30 30. ____ means that one large region of the universe is approximately the same as any other large region of the universe:

Key Theories of the Universe Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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