WorksheetsStellar Remnants
Total questions: 28
Worksheet time: 17mins
What spectacular event follows the red super giant phase for a large or massive star when it starts fusing iron in its core?
Big Bang
Supernova
Planetary Nebula
Nova
The upper limit of a white dwarf's mass is which of the following?
1 solar mass
1.5 solar masses
1.4 solar masses
.5 solar masses
A neutron star will have a radius closest in size to which of the following?
The sun
The Earth
A small city
A basketball
The Schwarzschild radius of a body is _______________________
The distance from its center at which nuclear fusion ceases
The distance from its surface at which an orbiting companion will be broken apart
The maximum radius that a neutron star can have before it collapses
The radius of a body at which its escape velocity equals the speed of light
Which of the following is the fate that awaits our sun?
Suffer core collapse and explode in a type II supernova and become a neutron star
Collapse without exploding and become a black hole
Eject its outer layers and leave behind its core as a white dwarf
Explode as a type Ia supernova
What makes supernovas explode?
It can happen because a chicken nugget decides it wants some sauce and it falls into a nuclear reactor and creates a supernova.
It can happen from a Moon stealing mass from a companion star and then stealing so much it explodes into a million pickles.
It can also happen when two neighboring galaxies collide.
It can happen when a star comes to the end of its life and has no more nuclear energy and some mass flows to the core until it can’t withstand its own gravitational force and collapses in on itself and blows up
Why don't we need to worry about the sun becoming a supernova?
The sun already became a supernova.
It is spinning too slowly.
It doesn't have the right elements.
It is not big enough.
Since most stars orbit in pairs, if one of the stars is a white dwarf, it can steal material from the other star and explode as a Type ____ supernova.
II
3G
1a
X
Where does most of the iron in the universe come from?
Iron is fused in the core of some white dwarf stars and released during a Type 1a supernova.
Iron is created as light leaves a star and interacts with the star's atmosphere.
Recycled metal on Earth is launched into space.
Iron was created during the big bang.
When massive stars go through supernova, they can leave behind a neutron star. These stars are so dense that a teaspoon of their material would weigh ____ million tons!
100
1,000
50
2
Some highly magnetized Neutron stars also rotate very rapidly, generating electromagnetic radiation from the poles. We call these ____.
quasars
pulsars
black holes
gamma ray bursts
Scientists theorize that a _____________________________ is at the center of every galaxy.
stellar black hole
cosmic black hole
supermassive black hole
star
When a Red Giant's outer atmosphere drifts away it is known as a ____________.
planetary cloud
White Dwarf cloud
planetary nebula
expanding nebula
What small, hot, faint objects are found at B?
neutron stars
black holes
white dwarfs
brown dwarfs
When a super-massive star dies, the result is known as a:
Type 1a supernova
Type 1b supernova
Type 1c supernova
Type II supernova
How are magnetars formed?
From neutron stars after undergoing a supernova.
From super-massive black holes.
From stellar black holes.
From star quakes.
What would happen to the solar system if our Sun was replaced by a black hole with equal mass?
The planets would all be sucked in by the black hole and destroyed
The planets orbits would decrease by a factor of 1/2
The planets orbits would not be affected
The outer planets would be pulled in, while the inner planets would be ejected due to a higher orbital velocity
