Foundations Of Astronomy Enhanced 13th Edition By Michael A. Seeds – Test Bank

True / False

1. One of the factors that a large molecular cloud must overcome in order for gravitational contraction to begin is the thermal energy of the gas.
a. True
b. False
ANSWER: True
REFERENCES: 11-1Making Stars from the Interstellar Medium
LEARNING OBJECTIVES: ASTR.SEED.16.11-1 – How do stars form?
OTHER: Bloom’s: Understand

2. One of the factors that a large molecular cloud must overcome in order for gravitational contraction to begin is rotation of the gas cloud.
a. True
b. False
ANSWER: True
REFERENCES: 11-1Making Stars from the Interstellar Medium
LEARNING OBJECTIVES: ASTR.SEED.16.11-1 – How do stars form?
OTHER: Bloom’s: Understand

3. One trigger that could start the gravitational contraction of a molecular cloud to form stars is a passing shock wave.
a. True
b. False
ANSWER: True
REFERENCES: 11-1Making Stars from the Interstellar Medium
LEARNING OBJECTIVES: ASTR.SEED.16.11-1 – How do stars form?
OTHER: Bloom’s: Understand

4. When a large gas cloud starts to collapse in a free-fall due to gravity, it will start to cool down as it contracts because of the atoms fall inward.
a. True
b. False
ANSWER: False
REFERENCES: 11-1Making Stars from the Interstellar Medium
LEARNING OBJECTIVES: ASTR.SEED.16.11-1 – How do stars form?
OTHER: Bloom’s: Understand

5. One of the major star forming regions in space is the Orion Nebula.
a. True
b. False
ANSWER: True
REFERENCES: 11-2The Orion Nebula: Evidence of Star Formation
LEARNING OBJECTIVES: ASTR.SEED.16.11-2 – What is the evidence that stars are forming now?
OTHER: Bloom’s: Understand

6. The proton-proton chain for fusing hydrogen into helium is a much more complicated process than the CNO Cycle for fusing hydrogen into helium.
a. True
b. False
ANSWER: False
REFERENCES: 11-5 The Source of Stellar Energy
LEARNING OBJECTIVES: ASTR.SEED.16.11-4 – How do stars make energy?
OTHER: Bloom’s: Understand

7. The temperature at the core of a star must be at least 1 million degrees Kelvin before fusion can begin.
a. True
b. False
ANSWER: False
REFERENCES: 11-5 The Source of Stellar Energy
LEARNING OBJECTIVES: ASTR.SEED.16.11-4 – How do stars make energy?
OTHER: Bloom’s: Understand

8. Main sequence O stars have convective cores because they fuse hydrogen in the proton-proton chain.
a. True
b. False
ANSWER: False
REFERENCES: 11-5 The Source of Stellar Energy
LEARNING OBJECTIVES: ASTR.SEED.16.11.5 – How do stars make energy?
OTHER: Bloom’s: Understand

9. Low mass stars like the Sun transport energy near their surface using convection.
a. True
b. False
ANSWER: True
REFERENCES: 11-5 The Source of Stellar Energy
LEARNING OBJECTIVES: ASTR.SEED.16.11.5 – How do stars make energy?
OTHER: Bloom’s: Understand

10. Convection is important in stars because it transports energy outward in the star.
a. True
b. False
ANSWER: True
REFERENCES: 11-5 The Source of Stellar Energy
LEARNING OBJECTIVES: ASTR.SEED.16.11-4 – How do stars make energy?
OTHER: Bloom’s: Understand