Lost in the Wreckage Verified Test Bank Third Edition Palen - Understanding Our Universe 3e Complete Test Bank by Stacy Palen. DOCX document preview.
Mission 2: Lost in the Wreckage
MULTIPLE CHOICE
1. The boulder-sized objects you encounter in the protoplanetary disk are referred to as
a. comets. d. planetary cores.
b. planetesimals. e. dwarf planets.
c. asteroids.
2. Which of the following is the most massive component of the gas and dust the spaceship flies through in Orion 114-426?
a. oxygen gas d. helium gas
b. H2O vapor e. methane gas (CH4)
c. H2 gas
3. Astronomers have discovered hundreds of objects in the Orion Nebula similar to 114-426. Which of the following statements about how stars form is not likely to be true if Orion is a representative star-forming region?
a. Stars form in isolation.
b. Most stars appear to form with disks capable of forming planetary systems.
c. Stars form in clusters.
d. Stars form in clouds of gas and dust.
e. Stars are still actively forming in the Milky Way.
4. The distance to Proplyd 114-426 is given as 1.02 × 1018 m. Convert this value to AU.
a. 6.8 × 105 AU c. 1.5 × 10-7 AU
b. 6.8 × 106 AU d. 1.5 × 10-6 AU
5. The diameter of the proto-planetary disk is determined to be 1.67 × 1014 m. Convert this value to AU.
a. 1.1 × 101 AU d. 9.0 × 10-4 AU
b. 1.1 × 102 AU e. 9.0 × 10-3 AU
c. 1.1 × 103 AU
1. Hundreds of young stars surrounded by disk-like structures similar to that of 114-426 have been observed in the Orion Nebula. What might this observation indicate about the possibility or likelihood of planet formation in the Orion Nebula?
2. The nebula glows due to the presence of four extremely hot, young stars commonly referred to as the Trapezium. Ultraviolet light from these stars stimulates emission from the predominantly hydrogen gas distributed throughout the star-forming cloud, resulting in the nebula’s signature “pink” glow. If you turned your Spectrum Analyzer on the nebula, which of the three types of spectra would you expect to see? Justify your answer.
3. Use your Star Chart to zoom back out to the view of the Milky Way. Is it possible to see the Orion Nebula or similar star forming regions this far removed from the galaxy? What feature allows you to identify them? Are they more strongly concentrated in certain regions of the galaxy than in others?