Practice Questions 1

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School

Brock University *

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Course

1P01

Subject

Astronomy

Date

Oct 30, 2023

Type

docx

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Uploaded by BrigadierTitaniumEchidna12

1. "It is known that the model of the universe that we have right now is 100% correct." True or false? False 2. What is a scientific model called before it is verified experimentally? It is called a prediction. 3. What happens if the results of experiments disagree with the predictions of a scientific theory? You make a new hypothesis with the necessary changes and test it again. 4. What is a challenge that astronomy has, which other sciences generally don't have? Astronomy has the challenge of constantly having to work around changing theories. There always new stars forming and old stars dying. 5. A famous astronomer wrote a paper with a new theory. The theory has not been tested experimentally, but the astronomer is VERY famous. Can we assume that the theory is correct? No because there is not guarantee that the theory is accurate. 6. What was the new class of astronomical objects predicted by Einstein's theory of relativity? 7. Is the number 3×10^7 smaller or larger than the number 6×10^5? (Note: ^ denotes a superscript, so 10^n is 1 followed by n zeros.) 8. What is a light-year? The distance light can travel in a year measured in kilometres. 9. "A fast race car can reach speeds of up to 10% of the speed of light." True or False? 10. Which is longer, a meter or a kilometer? Kilometer 11. I observed a supernova (an exploding star) in the sky this year. The distance to the supernova was 12,000 light-years. How long ago did the star actually explode? 12. What does the Earth have that no other planet in the solar system has? 13. How many planets are in the solar system? Can you name all of them? 14. Which planet is the closest to the Sun? Which planet is the farthest away from the Sun? 15. What's the difference between a planet and a star? 16. What is the closest star to the Sun? How far is it? How long does it take light from that star to get to us? 17. "There are several million stars in the Milky Way Galaxy." True or false? 18. Is the Sun at the center of the Milky Way Galaxy? 19. Have astronomers been able to take photos of the Milky Way Galaxy from outside the galaxy? 20. Is Andromeda the nearest galaxy to us? 21. What is the name of the cluster of galaxies that the Milky Way belongs to? 22. What is the name of the supercluster that this cluster belongs to? 23. "Oxygen is the most abundant chemical element in the universe." True or False? 24. What are the 3 types of subatomic particles that atoms are made of?

25. "Humans have existed for most of the lifetime of the Universe." True or False? 26. "The Earth has existed since the beginning of the Universe." True or False?

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