Why is dark matter difficult to detect?

It has no electromagnetic interaction

How does dark matter help galaxies maintain their structure?

Provides extra gravitational pull

Absorbs electromagnetic radiation

What is the Schwarzschild radius?

The radius of a black hole's event horizon

The distance from a black hole where light cannot escape

) The distance from the black hole to its accretion disk

The radius of the black hole's singularity

What is the event horizon of a black hole?

The boundary beyond which nothing can escape

The region where matter begins to spin rapidly

1. The outer edge of the accretion disk

What is a singularity in the context of a black hole?

The infinitely dense core of a black hole

The point at the event horizon where gravity is strongest

The center of the black hole's accretion disk

How is the mass of a black hole typically measured?

By its gravitational pull on nearby stars

What is the primary method astronomers use to detect black holes?

Observing visible light emitted by the black hole

Measuring radio waves from the black hole

Observing the behavior of nearby matter

The Lorentz factor, which accounts for time dilation

The acceleration of the moving object

What happens to the information that falls into a black hole according to the information paradox?

It is stored in the singularity

It remains at the event horizon

What is the focus of direct dark matter detection experiments?

Interactions with ordinary matter

Measuring annihilation products

How are supermassive black holes at the centers of galaxies detected?

By the intense light from accreting material

By their strong magnetic fields

By the size of their event horizon

What is the Penrose process in relation to black holes?

A process to extract energy from a rotating black hole

A method to measure a black hole's mass

The formation of a black hole's event horizon

1. The collapse of a star into a black hole

How does the concept of frame dragging relate to black holes?

It explains the twisting of spacetime around a rotating black hole

It describes the bending of light around a black hole

It refers to the time dilation effects near a black hole

1. It denotes the increase in gravitational force near a black hole

Which phenomenon occurs when two black holes merge?

The creation of a larger black hole

The destruction of both black holes

1. The formation of a neutron star

Round 2

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98 questions

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MULTIPLE CHOICE QUESTION

20 sec • 2 pts

Which curves provide evidence for the existence of dark matter?

Rotation curves

Elliptical curves

Spiral curves

Gravitational curves

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is one hypothesized particle that dark matter could be composed of?

Photons

Axions

Electrons

Protons

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which of the following is a property of dark matter?

Emits electromagnetic radiation

Does not interact with light

Visible to telescopes

Found only in black holes

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Which term describes the bending of light by massive objects, suggesting dark matter's presence?

Redshift

Lensing

Diffraction

Refraction

FILL IN THE BLANK QUESTION

20 sec • 1 pt

What does the cosmic microwave background (CMB) help scientists study?

FILL IN THE BLANK QUESTION

20 sec • 1 pt

What is the acronym for Weakly Interacting Massive Particles?

FILL IN THE BLANK QUESTION

20 sec • 1 pt

What percentage of the universe’s matter is dark matter?

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Round 2

Which curves provide evidence for the existence of dark matter?

What is one hypothesized particle that dark matter could be composed of?

Which of the following is a property of dark matter?

Which term describes the bending of light by massive objects, suggesting dark matter's presence?

What does the cosmic microwave background (CMB) help scientists study?

What is the acronym for Weakly Interacting Massive Particles?

What percentage of the universe’s matter is dark matter?

Axions are one type of ___________ particle hypothesized to make up dark matter.

Dark matter is invisible because it does not emit or absorb ___________.

The outer regions of galaxies rotate __________ than expected due to dark matter.

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