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UTA / Astronomy / ASTR 1345 / How much bigger is the sun than the moon?

# How much bigger is the sun than the moon? Description

##### Description: This is a study guide for the exam on 11/2
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Exam 2 Study Guide (11/2/16)

## How much bigger is the sun than the moon? The questions on the exam will be multiple choice, true-false, or matching. I am not going to do matching questions, but I will do the other two. Answers will be at the end, but please try to answer first before looking at the answer!

1. A solar eclipse is possible anytime from sunrise to sunset, but a lunar  eclipse is possible anytime between a full moon rise to full moon set.

a. True

b. False

2. The penumbral is the darker shadow that a body puts on another body,  while the umbra is the lighter shadow. (For example, when the Earth is  between the Moon and the Sun, the Earth casts a shadow on the Moon.  There is a dark shadow which is smaller and a larger, lighter shadow.) We also discuss several other topics like What are the three stages of attraction?

a. True

## What is a difference between sound waves and light waves? b. False

3. What is a total lunar eclipse?

a. When the Moon is in the penumbral of the Earth.

b. When the Moon is in the umbra of the Earth.

c. When the Earth is in the Moon’s penumbral.

d. When the Earth is in the Moon’s umbra.

4. How much bigger is the Sun than the Moon?

a. 40x

b. 400x

c. 4,000x

d. We don’t know

5. What is a difference between sound waves and light waves? a. Light waves need a medium, but sound waves don’t.

b. Sound waves need a medium, but light waves don’t.

## How many meters is 10^9 nano meters? c. Light waves travel faster than sound waves.

d. Both B and C

6. The wavelength is described as the distance between two crests or two  troughs (in meters). If you want to learn more check out How do you explain chirality?

a. True

b. False

7. What is the wave frequency?

a. The distance between 2 crests or 2 troughs

b. The number of crests or the number of troughs passing through any  point per time

c. Inversely related to the wavelength

d. Both B and C

8. White light is the same as visible light. If you want to learn more check out Why are men commonly believed to have greater sexual drive, interest and activity than women?

a. True

b. False

9. How many meters is 10^9 nano meters?

a. 1 meter

b. 10 meters

c. 100 meters

d. 1,000 meters

10. Red light has more energy than violet light.

a. True

b. False

11. Visible light is the only light.

a. True

b. False

12. What kind of light do humans give off?

a. Humans don’t give off light

c. Visible

d. Infrared

13. What is the order of the Electromagnetic Spectrum (from longest  wavelength to shortest wavelength)? We also discuss several other topics like How probation ends?

a. Radio, Infrared, Visible, Ultraviolet, X-rays, Gamma Rays b. Infrared, Radio, Ultraviolet, Visible, X-rays, Gamma Rays c. Ultraviolet, Visible, Radio, Infrared, X-rays, Gamma Rays d. Gamma Rays, X-rays, Radio, Infrared, Ultraviolet, Visible 14. Gamma rays are the most energetic waves.

a. True

b. False

15. When is the next solar eclipse?

a. We don’t know

b. Not until 2020

c. August 21, 2017

d. September 28, 2018

16. Light is NOT an electromagnetic radiation.

a. True

b. False

17. How do you calculate photon energy?Don't forget about the age old question of How rauvolfia serpentina went from being a traditional medicine to becoming a valued medicinal resource in western cultures?

a. Wavelength divided by the speed of light

b. Speed of light divided by wavelength

c. Wavelength divided by frequency  If you want to learn more check out Who wins and who loses from free international trade?

d. Frequency divided by speed of light

18. Visible light has the largest range out of all the light rays. a. True

b. False

19. Which type(s) of telescope(s) can only be used in space? a. X-ray telescopes

b. Gamma ray telescopes

d. A and B

20. Sound is NOT an electromagnetic wave.

a. True

b. False

21. What is spectroscopy?

a. The study of the stars’ elements

b. The study of the spectrum

c. The study of diffraction grading

d. None of the Above

22. You can use a spectroscope to view the spectrum. a. True

b. False

23. Which of the following are examples of diffraction grading?

a. CDs

b. Peacock feathers

c. Sun catchers

d. Water droplets

e. All of the Above

f. A,B, and C

g. Only A and B

24. Every chemical has its own unique spectrum when its light is looked at  through a prism.

a. True

b. False

25. What does an emission spectrum look like?

a. A continuous rainbow

b. Dark background with colored lines

c. Rainbow background with black lines

d. None of the Above

26. What will produce a continuous spectra?

a. All luminous solids or liquid hotter than than its surroundings  b. Low density hot gas

c. Cold gas with light source behind it

d. It varies

27. The Sun has an absorption spectra.

a. True

b. False

28. Electrons can stay in discrete energy orbits, but not inbetween.

a. True

b. False

29. How long can an electron stay in its 1st excited state?

a. 1 second

b. 0.5 seconds

c. 10^-6 seconds

d. 10^-8 seconds

30. When do we get an absorption spectra?

a. When an electron gets excited and jumps to a higher excited state b. When an electron gets excited and jumps out of the atom c. When an electron stays the same

d. When an electron goes back to the ground state

31. The ground state is the lowest energy state of an electron a. True

b. False

32. How many moons does Jupiter have?

a. 3

b. 63

c. 47

d. 37

33. How many moons do the Terrestrial planets have together? a. 87

b. 3

c. 45

d. 21

34. Pluto was discovered in 1930.

a. True

b. False

35. What is the IAU?

a. The International Astronomy University

b. The International Astronomical Union

c. The Imaging of Astronomy Uncovered

d. None of the Above

36. The asteroid belt is between Jupiter and Saturn.

a. True

b. False

37. What is the difference between mass and density?

a. Mass is the total amount of atoms in something, while density is the  degree of compactness

b. Mass is the degree of compactness, while density is the total amount  of atoms in something

c. Mass is the amount of light that bounces off of the object, while  density is how heavy it is

d. Mass is how heavy something is, while density is how big it is 38. Atoms can get excited collisionally or radiatively.

a. True

b. False

39. If an electron is not in the ground state and it is not ionized, it is excited. a. True

b. False

40. Electons’ orbits are NOT circular.

a. True

b. False

41. How many plutoids are in our solar system?

a. 1

b. 2

c. 4

d. 6

42. All the planets in our solar system have at least one moon. a. True

b. False

43. Planets are relatively isolated in space

a. True

b. False

44. Which of the following are TRUE differences between Terrestrial and Jovian planets?

a. Terrestrial planets are closer to the Sun, while Jovian planets are  farther away from the Sun

b. Terrestrial planets are larger than Jovian planets.

c. Jovian planets have more moons than Terrestrial planets. d. Terrestrial planets have a faster rotation than Jovian planets e. A and C

f. B and D

g. All of the Above

45. All the planets in our solar system have a solid or a liquid-solid core. a. True

b. False

46. Mercury has the highest albedo of the planets in our solar system, and  Venus has the lowest albedo.

a. True

b. False

47. How much less albedo does the Moon have than the Earth? a. 10%

b. 20%

c. 30%

d. 40%

48. Albedo is the amount of light that is reflected off of an object. What  happens to the rest of the light that is not reflected?

a. It goes through the object

b. It is absorbed by the object

c. It disappears

d. We don’t know

49. How much larger is the Moon’s range of temperature than the Earth’s? a. The same

b. 2x larger

c. 3x larger

d. 4x larger

50. If you measure your mass on Earth, and then go to the Moon and measure  your mass again, will it be different?

a. Yes, your mass will be 2x more than it was on Earth. b. Yes, your mass will be 2.5x more than it was on Earth. c. No, mass doesn’t change because of a change in gravity. d. None of the above

51. Weight = mass x gravity

a. True

b. False

1. A

2. B (The penumbral is the lighter and the umbra is the darker shadow) 3. B

4. B

5. D

6. A

7. D

8. A

9. A

10. B (Violet has more energy than red light.)

11. B

12. D

13. A

14. A

15. C

16. B (Light IS an electromagnetic radiation – EM)

17. B

18. B (Visible has the smallest range out of all the light rays) 19. D

20. A

21. B

22. A

23. F

24. A

25. B

26. A

27. A

28. A

29. D

30. A

31. A

32. B

33. B

34. A

35. B

36. B (The asteroid is between Mars and Jupiter)

37. A

38. A

39. A

40. A

41. C

42. B (Mercury and Venus do not have any moons)

43. A

44. E

45. A

46. B (Venus has the highest albedo and Mercury has the lowest albedo)

47. C 48. B 49. B 50. C 51. A

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