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How are most stellar black holes formed?
When the Sun explodes
When a comet enters Earth's atmosphere
When a massive star collapses after running out of fuel
When two planets collide
Which element marks the end of energy-producing fusion inside a massive star?
Hydrogen
Iron
Helium
Oxygen
What is a black hole's event horizon?
A ring of stars around the black hole
The point beyond which nothing can escape
A cloud of gas surrounding the black hole
The centre of the black hole
Why can't light escape from a black hole?
Space is too dark
Light is too slow
There is no oxygen
Its gravity is too strong
What is believed to be at the centre of a black hole?
A singularity
A planet
A galaxy
A giant star
What would someone far away see if you fell towards a black hole?
You disappear instantly
You bounce away
You appear to slow down
You speed up continuously
What is "spaghettification"?
A star turning into a planet
The stretching of an object caused by strong gravity
A black hole exploding
A black hole becoming invisible
Which type of black hole could allow you to cross the event horizon before being stretched?
A tiny asteroid
A white dwarf
A supermassive black hole
A neutron star
Where are supermassive black holes usually found?
On the edge of the Solar System
Inside planets
At the centres of galaxies
Between Earth and the Moon
Approximately how massive can supermassive black holes be?
About the same mass as Earth
Smaller than Jupiter
Millions or billions of times the mass of the Sun
Twice the mass of the Moon
According to the video, how do supermassive black holes probably grow?
By absorbing matter and merging with other black holes
By creating new stars
By freezing nearby planets
By collecting sunlight
What did Stephen Hawking predict black holes emit?
Solar wind
Magnetic waves
Gamma bursts
Hawking radiation
What effect does Hawking radiation have on black holes?
They stop attracting objects
They slowly lose mass over time
They become larger every day
They become stars again
What may eventually happen to black holes after an extremely long time?
They may completely evaporate
They become comets
They freeze forever
They turn into planets
Why do scientists still not fully understand what happens at a singularity?
It is too far from Earth
Current physics cannot fully explain the extreme conditions
Black holes are too small to study
No one has looked through a telescope
Which statement best describes a black hole?
A giant empty hole in space with no gravity
An object with gravity so strong even light can’t escape
A cloud made entirely of gas
A dying planet covered in darkness
