Understanding Dark Matter and Gravity

What is the main problem with the Milky Way's rotation that suggests the existence of dark matter?

• The galaxy is shrinking.

• The galaxy is expanding too quickly.

• The stars are moving slower than expected.

• The stars are moving faster than expected.

What phenomenon provides independent evidence for the existence of dark matter?

• Black hole evaporation

• Quantum entanglement

• Gravitational lensing

• Cosmic microwave background

What is the significance of gravitational lensing in the study of dark matter?

• It proves the existence of black holes.

• It demonstrates the expansion of the universe.

• It shows how light is unaffected by gravity.

• It provides a way to measure unseen mass.

What are MACHOs in the context of dark matter?

• Massive compact halo objects

• Microscopic atomic halo objects

• Magnetic cosmic halo objects

• Molecular compact halo objects

Why can't MACHOs account for all of the dark matter?

• They are too small to be detected.

• There aren't enough of them.

• They interact too strongly with light.

• They are too far away.

What is the Bullet Cluster used to demonstrate?

• The particle nature of dark matter

• The validity of modified gravity theories

• The existence of black holes

• The expansion of the universe

What does the Bullet Cluster suggest about dark matter?

• Dark matter is a real particle.

• Dark matter is a type of radiation.

• Dark matter is not affected by gravity.

• Dark matter is a form of energy.

What are WIMPs in the study of dark matter?

• Widely interacting massive particles

• Weakly interacting magnetic particles

• Widely interacting molecular particles

• Weakly interacting massive particles

What property of dark matter is crucial for galaxy formation?

• It is hot and fast-moving.

• It is highly visible.

• It is cold and slow-moving.

• It is electrically charged.

What is the relationship between WIMPs and supersymmetry?

• WIMPs are predicted by supersymmetry.

• WIMPs are unrelated to supersymmetry.

• WIMPs are a form of supersymmetry.

• WIMPs contradict supersymmetry.