Exploring the Mysteries of Black Holes

What happens to a star's core if it is less than 1.4 times the mass of the Sun?

• It becomes a black hole.

• It becomes a white dwarf.

• It becomes a neutron star.

• It explodes into a supernova.

At what core mass does a star become a neutron star?

• Exactly 3 times the Sun's mass

• More than 2.8 times the Sun's mass

• Between 1.4 and 2.8 times the Sun's mass

• Less than 1.4 times the Sun's mass

What is the escape velocity of a neutron star?

• 300,000 km/sec

• 600 km/sec

• 150,000 km/sec

• 11 km/sec

What is the event horizon of a black hole?

• The surface around the black hole where the escape velocity is the speed of light

• The point where the star's core stops collapsing

• The center of the black hole

• The region where light can escape

Why can't the Sun become a black hole?

• It is too hot.

• It is not massive enough.

• It is too old.

• It is too far from the center of the galaxy.

What would happen to the Earth if the Sun turned into a black hole?

• The Earth would stop rotating.

• The Earth would continue to orbit as it does now.

• The Earth would be sucked in immediately.

• The Earth would be flung out of the solar system.

What is spaghettification?

• The process of a star collapsing into a black hole

• The stretching of objects due to intense tidal forces near a black hole

• The formation of a neutron star

• The increase in escape velocity near a black hole

What happens to time near a black hole?

• It stops completely.

• It slows down.

• It remains the same.

• It speeds up.

What is gravitational redshift?

• The stretching of light waves as they escape a black hole's gravity

• The increase in the speed of light near a black hole

• The slowing down of time near a black hole

• The increase in gravity near a black hole

What did Einstein propose about space and time?

• They are separate entities.

• They are unaffected by gravity.

• They are parts of the same thing called space-time.

• They are only affected by black holes.