17.11- Quasars and Active Galactic Nuclei Quiz

What are active galactic nuclei (AGNs)?

• Centers of active galaxies emitting vast amounts of energy

• Dormant centers of galaxies

• Small stars in distant galaxies

• Planets orbiting black holes

What are quasars?

• Small, dim stars

• Extremely luminous centers of distant galaxies

• Planets in the Milky Way

• Dormant black holes

What is found at the center of active galaxies?

• Supermassive black holes

• Small asteroids

• Comets

• Nebulas

What is an accretion disk?

• A disk of matter swirling around a supermassive black hole

• A type of galaxy

• A small planet orbiting a star

• A ring of asteroids

Why are some galaxies not releasing a ton of energy like active galactic nuclei?

• They lack supermassive black holes

• Their black holes are dormant

• They are too far away

• They are too small

What is the main reason active galactic nuclei are considered powerful despite their small size?

• They are larger than most galaxies.

• They emit energy from a large volume of space.

• They emit more energy per second than larger galaxies.

• They are located at the edge of the universe.

Tags

NGSS.HS-PS4-3

What is a quasar?

• A type of star.

• A type of active galactic nucleus.

• A small planet.

• A distant galaxy.

How do astronomers determine the size of active galactic nuclei?

• By measuring their temperature.

• By observing their brightness changes over time.

• By calculating their distance from Earth.

• By analyzing their color spectrum.

What is the estimated size of the region from which active galactic nuclei emit energy?

• Larger than our solar system.

• The size of a small planet.

• No larger than our solar system.

• The size of a galaxy.

What is one of the learning outcomes related to active galaxies?

• Define the lifecycle of stars

• Identify the characteristic of active galaxies responsible for energy release

• Explain the formation of black holes

• Describe the structure of the Milky Way