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WorksheetsStar Life Cycle
Total questions: 15
Worksheet time: 5mins
Name
Class
Date
1.
______ is a force that causes dust particles to stick together in a nebula.
a)
nuclear fusion
b)
gravity
c)
hydrogen
d)
iron
2.
Helium is the result of ______ atoms combining in nuclear fusion.
a)
nuclear fusion
b)
gravity
c)
hydrogen
d)
iron
3.
A star is born and lit up when ______ happens and provides the star with energy that it will use for millions of years.
a)
nuclear fusion
b)
gravity
c)
hydrogen
d)
iron
4.
A super giant grows bigger and bigger until it climbs up the periodic table to _____.
a)
silicon
b)
oxygen
c)
hydrogen
d)
iron
5.
What is this an example of?
a)
White hole
b)
nebula
c)
protostar
d)
planetary nebula
6.
What color star lives the longest?
a)
blue
b)
red
c)
yellow
d)
white
7.
After a supernova of what used to be a blue star with a very large mass, what is left?
a)
white dwarf star
b)
black dwarf star
c)
black hole
d)
white hole
8.
How are the cores of stars able to stay lit after a planetary nova without having nuclear fusion any more?
a)
they are very dense and hot
b)
they are just the star, but smaller
c)
the light continues to earth, because of the distance
d)
there is energy that is left over and expands, which makes a new star
9.
What is the most dense type of star?
a)
brown dwarf star
b)
neutron star
c)
white dwarf star
d)
black dwarf star
10.
The _____ of a star explodes off in a super nova or planetary nebula.
a)
core
b)
stratosphere
c)
ionosphere
d)
outer atmosphere
11.
What temperature does nuclear fusion start?
a)
10,000,000
b)
100,000
c)
1,000,000,000
d)
∞
12.
What does a supernova create when it explodes?
a)
H2O
b)
Nothing
c)
a space object with strong gravity
d)
a white dwarf star
13.
Why do stars collapse in on itself?
a)
Diamonds are starting to form in the core
b)
H2O2 starts to build up
c)
It is exposed to too much radiation
d)
Hydrogen runs out
14.
What are the three things that can be left behind after a stars dies?
a)
Planetary nebula, black hole, white dwarf
b)
Plasma circle, white dwarf, black hole
c)
White dwarf, black hole, neutron star
d)
White hole, brown dwarf, asteroid.
15.
Why are black holes black?
a)
No light can escape the black hole's gravity
b)
No light is reflected from the closest stars
c)
They are transparent, so you see space
d)
Plants around it prevent light from hitting the black hole.
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