Black Holes

Front

If a dying star's core is less than 1.4 times the mass of the Sun, it becomes ___

Back

a white dwarf

Front

If a dying star's core is between 1.4 and 2.8 times the Sun's mass, it becomes ___

Back

a neutron star

Front

If a dying star's core is more than 2.8 times the Sun's mass, it becomes ___

Back

a black hole

Front

For Earth, the escape velocity is about ___

Back

11 km per second

Front

A neutron star, with its immense gravity, can have an escape velocity that's up to ___

Back

half the speed of light

Front

Nothing can escape, not even light, once the core of a neutron star shrinks down to ___

Back

roughly 18 km

Front

The surface around a black hole, where the escape velocity is the speed of light, is called ___

Back

the event horizon

Front

To become a black hole, the original star must have a mass of ___

Back

more than 20 times the Sun's mass

Front

If you could turn the Sun into a black hole, then the Earth would ___

Back

orbit it pretty much exactly as it does now

Front

The strength of gravity you feel from an object depends on ___ (Options: how large it is and your distance from its center, how massive it is and your distance from its center, how large it is and its density, how massive and dense it is)

Back

how massive it is and your distance from its center