Black Holes - The Universe's Mysterious Creations

The point believed by many scientists to be the center of a black hole is known as:

• Infinitum

• Singularity

• Centrality

The maximum mass a white dwarf can contain without becoming a neutron star or black hole is called the

• White Dwarf Limit

• Einstein Limit

• Chandrasekhar Limit

General Relativity predicts that black holes have

• infinite density

• infinite volume

• infinite spin

When stars die, they become black holes if their mass is at least

• Half the mass of the sun

• Three times the mass of the sun

• Million times the mass of the sun

Every object has a radius within which its mass, if condensed, would require an escape velocity equal to or greater than the speed of light. This radius is called

• Chandrasekhar radius

• Schwarzschild radius

• Einstein radius

The supermassive black hole in the centre of our galaxy is called

• Alpha Centauri

• Sagittarius A

• Eta Carinae

Quasars are galaxies with a supermassive black hole that is

• active

• dying

• dormant

If the sun was condensed beyond its Schwarzschild radius, converting it into a black hole, Earth would fall in.

• True

• False

The event horizon of a black hole represents

• the moment a black hole is born

• its density limit

• the boundary of no return

A black hole evaporates slowly, releasing (a)   radiation.