Star Evolution Quick Check
3 of 43 of 4 Items
Question
Which is a possible sequence in the life cycle of a massive star?(1 point)
Responses
super red giant, protostar, nebula, star, neutron star, supernova
super red giant, protostar, nebula, star, neutron star, supernova
nebula, protostar, star, super red giant, supernova, neutron star
nebula, protostar, star, super red giant, supernova, neutron star
supernova, star, black hole, planetary nebula, super red giant, protostar
supernova, star, black hole, planetary nebula, super red giant, protostar
planetary nebula, super red giant, protostar, supernova, star, black hole
The correct response is:
nebula, protostar, star, super red giant, supernova, neutron star
Star Evolution Quick Check
4 of 44 of 4 Items
Question
Use the diagram to answer the question.
The life trajectory of a stellar nebula is shown. The stellar nebula, a purple gas ball turns into an average star, depicted as a yellow circle, within 500 million years. The average star turns into a red giant, depicted as a medium sized red circle, within 10000 million years. The red giant turns into a planetary nebula, a bright star surrounded by green and blue gases, within 1000 million years. And the planetary nebula gradually cools into a white dwarf, depicted as a small white circle. The stellar nebula can also turn into a massive star, depicted as a medium blue circle, within 0.1 million years. The massive star turns into a red supergiant, depicted as a large orange circle, within 15 million years. The red supergiant turns into a supernova, a bright white star, within 1 million years. The supernova can either turn into a neutron star, depicted as a yellow sphere with white rays coming out of its sides, or a black hole, a small black circle surrounded by purple rays.
Which of these can a star become at the end of its evolution? Choose the three correct answers.
(2 points)
Responses
a brown dwarf
a brown dwarf
a white dwarf
a white dwarf
a supernova
a supernova
a black hole
a black hole
a neutron star
a neutron star
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The correct responses are:
- a white dwarf
- a supernova
- a black hole
Star Evolution Quick Check
2 of 42 of 4 Items
Question
Use the diagram to answer the question.
The life trajectory of a stellar nebula is shown. The stellar nebula, a purple gas ball turns into an average star, depicted as a yellow circle, within 500 million years. The average star turns into a red giant, depicted as a medium sized red circle, within 10000 million years. The red giant turns into a planetary nebula, a bright star surrounded by green and blue gases, within 1000 million years. And the planetary nebula gradually cools into a white dwarf, depicted as a small white circle. The stellar nebula can also turn into a massive star, depicted as a medium blue circle, within 0.1 million years. The massive star turns into a red supergiant, depicted as a large orange circle, within 15 million years. The red supergiant turns into a supernova, a bright white star, within 1 million years. The supernova can either turn into a neutron star, depicted as a yellow sphere with white rays coming out of its sides, or a black hole, a small black circle surrounded by purple rays.
Based on the diagram, which statements about stellar evolution are true? Select the two correct answers.
(1 point)
Responses
Massive stars evolve more slowly than average stars.
Massive stars evolve more slowly than average stars.
Massive and average stars evolve at about the same speed.
Massive and average stars evolve at about the same speed.
Massive stars evolve more quickly than average stars.
Massive stars evolve more quickly than average stars.
Average stars evolve more quickly than massive stars.
Average stars evolve more quickly than massive stars.
Average stars evolve more slowly than massive stars.
Average stars evolve more slowly than massive stars.
The correct responses are:
- Massive stars evolve more quickly than average stars.
- Average stars evolve more slowly than massive stars.
Which stages do all stars have in common in their life cycles?(1 point)
Responses
nebula
nebula
white dwarf
white dwarf
black hole
black hole
protostar
The correct response is:
nebula
1. Based on the diagram, which statements about stellar evolution are true? Select the two correct answers:
C. Average stars evolve more slowly than massive stars,
D. Massive starts evolve more quickly the average stars.
2. Which of these can a star become at the end of its evolution? Choose the three correct answers.
A. A black hole
D. A white dwarf
E. A neutron star
3. Which is a possible sequence in the life cycle of a massive star?
B. Nebula, Protostar, star, super red giant, supernova, neutron star.
4. Which stages do all stars have in common in their life cycles?
C. Nebula
D. Protostar
1. The correct statements about stellar evolution based on the diagram are:
C. Average stars evolve more slowly than massive stars.
D. Massive stars evolve more quickly than average stars.
2. The correct options for what a star can become at the end of its evolution are:
A. A black hole
D. A white dwarf
E. A neutron star
3. The correct sequence in the life cycle of a massive star is:
B. Nebula, Protostar, star, super red giant, supernova, neutron star.
4. The correct stages that all stars have in common in their life cycles are:
C. Nebula
D. Protostar
To determine the correct answer, we need to understand the life cycle of a massive star. Here are the stages in the life cycle of a massive star:
1. Nebula: A massive star begins its life as a cloud of gas and dust called a nebula.
2. Protostar: The nebula undergoes gravitational collapse, forming a dense core known as a protostar. The protostar continues to gather mass.
3. Star: Once the protostar reaches a critical temperature and density, nuclear fusion begins in its core, and it becomes a star.
4. Super Red Giant: As the star exhausts its nuclear fuel, it expands and becomes a super red giant.
5. Supernova: When a super red giant depletes its nuclear fuel, it undergoes a catastrophic explosion called a supernova.
6. Neutron Star or Black Hole: Depending on the mass of the star, the core left behind after a supernova can either form a neutron star or collapse further to become a black hole.
Now let's examine the given options:
Option 1: super red giant, protostar, nebula, star, neutron star, supernova
Option 2: nebula, protostar, star, super red giant, supernova, neutron star
Option 3: supernova, star, black hole, planetary nebula, super red giant, protostar
Option 4: planetary nebula, super red giant, protostar, supernova, star, black hole
Only Option 2, "nebula, protostar, star, super red giant, supernova, neutron star," follows the correct sequence from the earlier stages to the later stages in the life cycle of a massive star.
Therefore, the correct answer is Option 2.