Black Holes

The escape velocity of a planet or a star depends on these two factors...

• speed and rotation of the object.

• mass and radius of the object.

• mass and position of the object.

• rotation and revolution of the object.

Tags

NGSS.HS-PS2-4

The boundary around a black hole, where the escape velocity is the speed of light, is called ...

• the observable boundary

• the event horizon

• the progenitor surface

• The Chandrasekhar Limit

To become a black hole, the original star must have ____________

• a fraction of the Sun's mass

• same as Sun's mass

• much much larger than Sun's mass

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

• quickly get pulled in into the black hole

• orbit it slower than it does now

• orbit it pretty much exactly as it does now

• orbit it faster than it does now

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

The strength of gravity you feel from an object depends on ...

• how massive and dense it is

• how massive it is and your distance from its center

• how many planets orbit it

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

Small black holes with masses ranging from about 3 to a few dozen solar masses are called ...

• white holes

• supermassive black holes

• stellar-mass black holes

• gray holes

The black hole at the center of our own Milky Way galaxy has a mass of ___

• 5 times the Sun's mass

• 1/10 times the Sun's mass

• 1 times the Sun's mass

• 5 million times the Sun's mass

The vertical stretching of an object, as it falls into a black hole, is called ...

• fettuccination

• the linguine effect

• spaghettification

• time dilation

What we perceive as gravity is really ...

• a dent in reality-fabric

• a warping of space-time

• a bump in the stellar-textile

• a bending of the event horizon

Tags

NGSS.HS-PS2-4

At the event horizon of a black hole, the passage of time ___

• essentially stops

• reverses

• speeds up