17-3 Collission And Assembly of Galaxies

What happens when two spiral galaxies collide?

• They form a black hole

• They create a starburst galaxy

• They stop moving

• They become elliptical galaxies immediately

What galaxy is expected to collide with the Milky Way in about 4 billion years?

• Galaxy M31 (Andromeda)

• Galaxy M32

• Galaxy M33

• Galaxy M34

What is the result of the collision between the Andromeda galaxy and the Milky Way?

• A new spiral galaxy

• A large elliptical galaxy

• A black hole

• A star cluster

What is the main ingredient for new star formation in galaxies?

• Dark matter

• Interstellar gas and dust

• Cosmic rays

• Black holes

What is the humorous analogy used to describe galaxy collisions?

• Galaxies dancing

• Galaxies waving hello

• Galaxies playing tag

• Galaxies singing

What is the expected outcome of a collision between two spiral galaxies?

• Formation of a black hole

• Creation of a starburst galaxy

• Destruction of both galaxies

• Formation of a new planet

What does the Bottom-Up Hypothesis state?

• Large galaxies form from the collision of two smaller galaxies

• Large galaxies form from the combinations of small galaxies and star clusters

• Large galaxies form from the absorption of interstellar dust

• Large galaxies form from the explosion of supernovae

What happens when two uniform disk galaxies come near one another without colliding?

• They form a new galaxy

• They create tidal forces that can form spiral arms

• They merge into an elliptical galaxy

• They explode into smaller galaxies

What is the metaphor used to describe the absorption of small galaxies by larger ones?

• A car collision

• A snowball merging with a snowman

• A tidal wave

• A star explosion

What is the result of tidal forces between two galaxies?

• Formation of new stars

• Formation of spiral arms

• Creation of black holes

• Destruction of both galaxies