1 Flashcards
What is a black hole?
A region in space where gravity is so strong that nothing, not even light, can escape.
True or False: Black holes can be seen directly.
False
Fill in the blank: A black hole is formed when a _______ star collapses.
massive
What is the boundary around a black hole called?
The event horizon.
What happens if something crosses the event horizon?
It cannot escape the black hole.
Multiple Choice: What is the point at the center of a black hole called? A) Singularity B) Event Horizon C) Galaxy
A) Singularity
What are the two types of black holes?
Stellar black holes and supermassive black holes.
True or False: Supermassive black holes are found at the center of most galaxies.
True
Fill in the blank: The Milky Way galaxy has a supermassive black hole known as _______.
Sagittarius A*
What is one way scientists detect black holes?
By observing the effects of their gravity on nearby stars.
Multiple Choice: Which of the following can a black hole pull in? A) Light B) Gas C) Stars D) All of the above
D) All of the above
What is the ‘point of no return’ around a black hole called?
The event horizon.
True or False: Black holes can grow by absorbing matter.
True
Fill in the blank: A black hole’s gravitational pull is _______ than that of other objects.
stronger
What happens to time near a black hole?
Time slows down compared to areas farther away.
Multiple Choice: Which is NOT a type of black hole? A) Mini black hole B) Stellar black hole C) Giant black hole
C) Giant black hole
What is the ‘Hawking radiation’?
Theoretical radiation that black holes emit, which could lead to their eventual evaporation.
True or False: Black holes can be created by the collision of neutron stars.
True
Fill in the blank: The first black hole ever discovered is called _______.
Cygnus X-1
What is a common misconception about black holes?
That they suck everything in around them like a vacuum.
Multiple Choice: What do we call the area around a black hole where matter is spinning? A) Accretion disk B) Orbit C) Nebula
A) Accretion disk
True or False: All black holes are the same size.
False
What is the largest known black hole?
TON 618.
Fill in the blank: Black holes can be detected indirectly by observing their effect on _______.
surrounding stars and gas.
What is the scientific term for the study of black holes?
Astrophysics.
Multiple Choice: How do black holes affect light? A) They make it brighter B) They bend it C) They eliminate it
B) They bend it
True or False: Once something falls into a black hole, it can come back out.
False
