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: 11-1 Making 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: 11-1 Making 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: 11-1 Making 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: 11-1 Making 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: 11-2 The 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
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