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WorksheetsAstronomy Review Part Three
Total questions: 11
Worksheet time: 5mins
Name
Class
Date
1.
This is the inner-most layer of the sun, where nuclear fusion happens.
a)
core
b)
corona
c)
photosphere
d)
chromosphere
2.
At 10,000 degrees Celsius, hydrogen begins to change into helium and energy is released in a process called
a)
supernova
b)
pulsar
c)
nuclear fusion
d)
nuclear fission
3.
What is the name of the gas/dust clouds that form stars?
a)
Nebulas
b)
Protostars
c)
Supernova
d)
Neutron Star
4.
What is the sun mostly made up of
a)
Helium
b)
Core
c)
Carbon
d)
Hydrogen
5.
What protects life on Earth from gamma rays, X rays, and particles emitted by the Sun?
a)
The ozone layer in the stratosphere
b)
The ionosphere
c)
The magnetosphere (Earth's magnetic field)
d)
Clouds
6.
How old is the sun?
a)
1 million years old
b)
4.5 million years old
c)
4.5 billion years old
d)
we do not know
7.
Nuclear fusion produces the sun's energy. It fuses hydrogen into ___ atoms.
a)
carbon
b)
nitrogen
c)
lithium
d)
helium
8.
Most of the sun’s energy is a result of
a)
nuclear fusion
b)
nuclear fission
c)
atomic reactions
d)
coronal mass ejection
9.
This picture shows
a)
Nuclear Fusion
b)
Luminosity
c)
Characteristic
10.
Nuclear fusion makes _____________.
a)
electric and chemical energy.
b)
light and heat energy.
11.
Composition means:
a)
The size of a star
b)
What a star is made of
c)
How much light energy a star makes
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