Galaxies, Classification, and Formation Quiz

What is the Hubble sequence and how does it classify galaxies?

• It is a classification system based on the shape and appearance of galaxies.

• It is a classification system based on the color of galaxies.

• It is a classification system based on the age of galaxies.

• It is a classification system based on the distance of galaxies from Earth.

Explain the theory of galaxy formation known as the Big Bang theory.

• The Big Bang theory states that the universe began as a cold, dense point and has been contracting ever since.

• The Big Bang theory states that the universe began as a hot, dense point and has been expanding ever since.

• The Big Bang theory states that the universe began as a hot, sparse point and has been shrinking ever since.

• The Big Bang theory states that the universe began as a moderate, dense point and has been staying the same ever since.

Describe the different types of galaxies in the Hubble sequence.

• Red, blue, green, yellow

• Planetary, lunar, solar, stellar

• The different types of galaxies in the Hubble sequence are elliptical, lenticular, spiral, and irregular.

• Circular, rectangular, triangular, hexagonal

What are the main components of the galaxy formation theory called the Hierarchical Model?

• dark matter, gas, and gravity

• light, heat, and radiation

• stars, planets, and asteroids

• time, space, and energy

How do astronomers classify galaxies based on their shapes?

• Solar system grouping

• Hubble sequence

• Star Wars classification

• Galactic alphabet

Explain the concept of elliptical galaxies and their characteristics.

• Elliptical galaxies are irregular in shape and have no specific age of stellar populations.

• Elliptical galaxies have a spiral shape and are filled with young stellar populations.

• Elliptical galaxies are known for their colorful and vibrant appearance due to the presence of gas and dust.

• Elliptical galaxies are smooth and featureless with older stellar populations.

Discuss the role of dark matter in the formation of galaxies.

• Dark matter causes the expansion of galaxies

• Dark matter is responsible for the color of galaxies

• Dark matter provides the gravitational pull necessary for the formation of galaxies.

• Dark matter has no role in the formation of galaxies

What are the differences between spiral and irregular galaxies?

• Spiral galaxies have no arms and a central bulge, while irregular galaxies have well-defined arms.

• Spiral galaxies lack a distinct shape or structure, while irregular galaxies have well-defined arms and a central bulge.

• Spiral galaxies have well-defined arms and a central bulge, while irregular galaxies lack a distinct shape or structure.

• Spiral galaxies and irregular galaxies have the same shape and structure.

Describe the galaxy classification system known as the Tuning Fork diagram.

• It is a classification system for animals based on their habitat and diet.

• It is a classification system for cars based on their speed and fuel efficiency.

• It is a classification system for fruits based on their color and taste.

• It is a classification system for galaxies based on their shape and structure.

Explain the concept of galaxy mergers and their impact on galaxy formation.

• Galaxy mergers have no impact on galaxy formation

• Galaxy mergers cause galaxies to shrink in size

• Galaxy mergers can impact galaxy formation by triggering star formation and the growth of supermassive black holes.

• Galaxy mergers lead to the destruction of supermassive black holes