Download c. Both events could happen at the same time.

Activity 11: Ranking Task for Formation of Planetary Systems
©2014 W. W. Norton & Company, Inc.
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Post-11.1: Let’s apply the ranking of events to celestial objects.
In each scenario, which event must happen first? Are there
examples where both events can happen simultaneously? a. Dense interstellar cloud contracts under gravity.
b. Nuclear fusion begins in star’s core.
c. Both events could happen at the same time.
©2014 W. W. Norton & Company, Inc.
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Post-11.1: Let’s apply the ranking of events to celestial objects.
In each scenario, which event must happen first? Are there
examples where both events can happen simultaneously? a. Dense interstellar cloud contracts under gravity.
b. Nuclear fusion begins in star’s core.
c. Both events could happen at the same time.
©2014 W. W. Norton & Company, Inc.
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Post-11.2: In this scenario, which event must happen
first?
a. Cloud spins faster because of conservation of
angular momentum.
b. Gravitational potential energy is converted to
kinetic energy.
c. Both events could happen at the same time.
©2014 W. W. Norton & Company, Inc.
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Post-11.2: In this scenario, which event must happen
first?
a. Cloud spins faster because of conservation of
angular momentum.
b. Gravitational potential energy is converted to
kinetic energy.
c. Both events could happen at the same time.
©2014 W. W. Norton & Company, Inc.
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Post-11.3: In this scenario, which event must happen
first?
a. A stellar wind blows from the central star.
b. Inner parts of the interstellar cloud undergo freefall collapse.
c. Both events could happen at the same time.
©2014 W. W. Norton & Company, Inc.
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Post-11.3: In this scenario, which event must happen
first?
a. A stellar wind blows from the central star.
b. Inner parts of the interstellar cloud undergo
free-fall collapse.
c. Both events could happen at the same time.
©2014 W. W. Norton & Company, Inc.
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Post-11.4: In this scenario, which event must happen
first?
a. Planetesimals form from collisions.
b. A flattened disk forms because of the
conservation of angular momentum.
c. Both events happen at the same time.
©2014 W. W. Norton & Company, Inc.
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Post-11.4: In this scenario, which event must happen
first?
a. Planetesimals form from collisions.
b. A flattened disk forms because of the
conservation of angular momentum.
c. Both events happen at the same time.
©2014 W. W. Norton & Company, Inc.
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This concludes Activity 11: Ranking Task for Formation
of Planetary Systems
©2014 W. W. Norton & Company, Inc.
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