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Galactic Winds and Outflows

Description: Galactic Winds and Outflows Quiz
Number of Questions: 15
Created by:
Tags: astrophysics galactic winds outflows
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What is the primary driving mechanism for galactic winds?

  1. Supernova explosions

  2. Active galactic nuclei

  3. Stellar winds

  4. Dark matter interactions

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Correct Option: A
Explanation:

Supernova explosions inject a large amount of energy and momentum into the interstellar medium, driving the formation of galactic winds.

Which type of galaxies are most likely to exhibit powerful galactic winds?

  1. Elliptical galaxies

  2. Spiral galaxies

  3. Irregular galaxies

  4. Lenticular galaxies

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Correct Option:
Explanation:

Starburst galaxies, which are characterized by intense star formation activity, often exhibit powerful galactic winds due to the high rate of supernova explosions.

What is the typical velocity range of galactic winds?

  1. 10-100 km/s

  2. 100-1000 km/s

  3. 1000-10000 km/s

  4. 10000-100000 km/s

Show answer
Correct Option: B
Explanation:

Galactic winds typically have velocities in the range of 100-1000 km/s, depending on the properties of the host galaxy and the driving mechanism.

How do galactic winds affect the evolution of galaxies?

  1. They remove gas and metals from the galaxy, quenching star formation.

  2. They trigger star formation by compressing the interstellar medium.

  3. They regulate the growth of black holes by providing fuel for accretion.

  4. They shape the morphology of galaxies by driving gas out of the disk.

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Correct Option:
Explanation:

Galactic winds can have a significant impact on the evolution of galaxies by removing gas and metals, triggering star formation, regulating black hole growth, and shaping the galaxy's morphology.

What is the role of outflows in the formation and evolution of galaxies?

  1. They expel gas and metals from galaxies, enriching the intergalactic medium.

  2. They regulate the growth of galaxies by limiting the supply of gas for star formation.

  3. They drive turbulence in the interstellar medium, promoting star formation.

  4. They shape the morphology of galaxies by creating voids and cavities in the interstellar medium.

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Correct Option:
Explanation:

Outflows play a crucial role in the formation and evolution of galaxies by expelling gas and metals, regulating star formation, driving turbulence, and shaping the galaxy's morphology.

Which type of outflows are driven by the accretion of matter onto supermassive black holes?

  1. Radio jets

  2. Molecular outflows

  3. Bipolar outflows

  4. Galactic winds

Show answer
Correct Option: A
Explanation:

Radio jets are powerful outflows driven by the accretion of matter onto supermassive black holes, often observed in active galactic nuclei.

What is the typical velocity range of molecular outflows?

  1. 10-100 km/s

  2. 100-1000 km/s

  3. 1000-10000 km/s

  4. 10000-100000 km/s

Show answer
Correct Option: A
Explanation:

Molecular outflows, driven by the formation of new stars, typically have velocities in the range of 10-100 km/s.

How do outflows affect the chemical composition of galaxies?

  1. They enrich the intergalactic medium with heavy elements.

  2. They regulate the abundance of metals in the interstellar medium.

  3. They drive the formation of molecular clouds and star clusters.

  4. They shape the morphology of galaxies by creating voids and cavities in the interstellar medium.

Show answer
Correct Option:
Explanation:

Outflows can have a significant impact on the chemical composition of galaxies by enriching the intergalactic medium with heavy elements, regulating the abundance of metals in the interstellar medium, and driving the formation of molecular clouds and star clusters.

Which type of outflows are associated with the formation of protoplanetary disks?

  1. Bipolar outflows

  2. Molecular outflows

  3. Radio jets

  4. Galactic winds

Show answer
Correct Option: A
Explanation:

Bipolar outflows, driven by the accretion of matter onto young stars, are often associated with the formation of protoplanetary disks.

What is the role of outflows in the feedback cycle of galaxy formation and evolution?

  1. They regulate the growth of galaxies by limiting the supply of gas for star formation.

  2. They drive turbulence in the interstellar medium, promoting star formation.

  3. They shape the morphology of galaxies by creating voids and cavities in the interstellar medium.

  4. All of the above

Show answer
Correct Option: D
Explanation:

Outflows play a crucial role in the feedback cycle of galaxy formation and evolution by regulating star formation, driving turbulence, and shaping the galaxy's morphology.

Which type of outflows are driven by the radiation pressure from young, massive stars?

  1. Radio jets

  2. Molecular outflows

  3. Bipolar outflows

  4. Radiation-driven outflows

Show answer
Correct Option: D
Explanation:

Radiation-driven outflows are driven by the radiation pressure from young, massive stars, often observed in star-forming regions.

What is the typical velocity range of radiation-driven outflows?

  1. 10-100 km/s

  2. 100-1000 km/s

  3. 1000-10000 km/s

  4. 10000-100000 km/s

Show answer
Correct Option: B
Explanation:

Radiation-driven outflows typically have velocities in the range of 100-1000 km/s.

How do radiation-driven outflows affect the formation and evolution of star clusters?

  1. They regulate the growth of star clusters by limiting the supply of gas for star formation.

  2. They drive turbulence in the interstellar medium, promoting star formation.

  3. They shape the morphology of star clusters by creating voids and cavities in the interstellar medium.

  4. All of the above

Show answer
Correct Option: D
Explanation:

Radiation-driven outflows can have a significant impact on the formation and evolution of star clusters by regulating star formation, driving turbulence, and shaping the cluster's morphology.

Which type of outflows are associated with the formation of active galactic nuclei?

  1. Radio jets

  2. Molecular outflows

  3. Bipolar outflows

  4. Galactic winds

Show answer
Correct Option: A
Explanation:

Radio jets are powerful outflows associated with the formation of active galactic nuclei, driven by the accretion of matter onto supermassive black holes.

What is the role of outflows in the evolution of supermassive black holes?

  1. They regulate the growth of supermassive black holes by limiting the supply of gas for accretion.

  2. They drive turbulence in the interstellar medium, promoting accretion onto supermassive black holes.

  3. They shape the morphology of supermassive black holes by creating voids and cavities in the interstellar medium.

  4. All of the above

Show answer
Correct Option: D
Explanation:

Outflows can have a significant impact on the evolution of supermassive black holes by regulating accretion, driving turbulence, and shaping the black hole's morphology.

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