Nebulas
What do all stars START as? (white dwarfs or nebulas)
Nebulas
A stars lifetime depends on what?
Its mass
False
A neutron star is ________(smaller or bigger) and ________(less dense or more dense) than a white dwarf
smaller and more dense
When a cloud pulls together and has enough mass, _______ is formed
a protostar
After how many years do stars begin running out of fuel?
millions or billions of years
What do stars with low mass or medium mass become?
red giants
Can we see black holes with a telescope? Yes or No
No
Nebulas are clouds of ______ and ______ out in space
gas and dust
When a star is bigger, with more mass, it will live ________ (shorter or longer)
shorter
A white dwarf is around the same size as ______ with the same mass of the _______
Earth
Sun
The biggest stars in our universe can become _________ _________
black holes
What signals the birth of a star?
nuclear fusion
When a star runs out of fuel, its core _______ (expands or shrinks) and the outer portion _________(expands or shrinks)
shrinks
expands
Supernovas happen when _________ explode
supergiants
True or False: A black hole is an object with gravity that is so strong and nothing can escape it.
True
When a nebula collapses, it becomes ________ and _____ (light and cool or dense and hot)
dense and hot
When a star runs out of fuel it can become 3 things:
a white dwarf
a neutron star
a black hole
The material left behind from a supergiant explosion forms a ________ star
neutron star
What is 1 way that Astronomers can detect black holes?
Indirectly by observing the movement of particles around a black hole
AND
They can detect x-rays from hot gas around a black hole