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Which of these statements about black holes is true?
 
Black holes can pull in gas, dust, and even light
 
Black holes suck up the entire universe.
 
Black holes only exist in science fiction.
 
Black holes can only pull in objects during the daytime.
What would happen to an astronaut who got too close to a small black hole?
 
They would be stretched into a long, thin shape by gravity
 
They would freeze into ice immediately
 
They would float safely around it forever
 
They would instantly become invisible
Which force is mainly responsible for creating a black hole?
 
Gravity
 
Magnetism
 
Friction
 
Electricity
What is a light-year?
 
The distance light travels in one year
 
The time it takes the Earth to orbit the Sun
 
The brightness of a star
 
The age of a galaxy
How do astronomers know a black hole is present if they cannot see it directly?
 
They observe its effects on nearby stars, gas, and light
 
They listen for loud sounds in space
 
They watch it glow brightly in visible light
 
They see its shadow on the Moon
Which of these is NOT likely to become a black hole?
 
Our Sun
 
A star much bigger than the Sun
 
A very massive star at the end of its life
 
A giant star that runs out of fuel
What happens if our Sun became a black hole?
 
The planets would continue orbiting it
 
All the planets would immediately be sucked in
 
Earth would explode instantly
 
The Moon would become a star
What is the closest known black hole to Earth?
 
It is over 1,000 light-years away
 
It is between Earth and the Moon
 
It is inside our Solar System
 
It is on Mars
Which statement best describes a black hole?
 
An object with gravity so strong even light can’t escape
 
A giant empty hole in space with no gravity
 
A dying planet covered in darkness
 
A cloud made entirely of gas
Why do scientists still not fully understand what happens at a singularity?
 
Current physics cannot fully explain the extreme conditions
 
No one has looked through a telescope
 
It is too far from Earth
 
Black holes are too small to study
What may eventually happen to black holes after an extremely long time?
 
They may completely evaporate
 
They turn into planets
 
They become comets
 
They freeze forever
What effect does Hawking radiation have on black holes?
 
They slowly lose mass over time
 
They become larger every day
 
They stop attracting objects
 
They become stars again
What did Stephen Hawking predict black holes emit?
 
Hawking radiation
 
Gamma bursts
 
Solar wind
 
Magnetic waves
According to the video, how do supermassive black holes probably grow?
 
By absorbing matter and merging with other black holes
 
By collecting sunlight
 
By freezing nearby planets
 
By creating new stars
Approximately how massive can supermassive black holes be?
 
Millions or billions of times the mass of the Sun
 
About the same mass as Earth
 
Twice the mass of the Moon
 
Smaller than Jupiter
Where are supermassive black holes usually found?
 
At the centres of galaxies
 
Between Earth and the Moon
 
Inside planets
 
On the edge of the Solar System
Which type of black hole could allow you to cross the event horizon before being stretched?
 
A supermassive black hole
 
A tiny asteroid
 
A neutron star
 
A white dwarf
What is "spaghettification"?
 
The stretching of an object caused by strong gravity
 
A black hole exploding
 
A star turning into a planet
 
A black hole becoming invisible
What would someone far away see if you fell towards a black hole?
 
You appear to slow down
 
You disappear instantly
 
You speed up continuously
 
You bounce away
What is believed to be at the centre of a black hole?
 
A singularity
 
A giant star
 
A planet
 
A galaxy
Why can't light escape from a black hole?
 
Its gravity is too strong
 
There is no oxygen
 
Space is too dark
 
Light is too slow
What is a black hole's event horizon?
 
The point beyond which nothing can escape
 
The centre of the black hole
 
A ring of stars around the black hole
 
A cloud of gas surrounding the black hole
Which element marks the end of energy-producing fusion inside a massive star?
 
Iron
 
Oxygen
 
Hydrogen
 
Helium
How are most stellar black holes formed?
 
When a massive star collapses after running out of fuel
 
When two planets collide
 
When the Sun explodes
 
When a comet enters Earth's atmosphere
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