NEW
Font size
S
M
L
XL
WorksheetsOur Star
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
Most of the sun’s energy is a result of
a)
nuclear fusion
b)
nuclear fission
c)
atomic reactions
d)
coronal mass ejection
2.
When hydrogen nuclei fuse into helium nuclei
a)
the nuclei die.
b)
energy is released.
c)
particles collide
d)
particles neutralize.
3.
The middle layer of the sun's interior that contains very tightly packed gas is called the _____________.
a)
photosphere
b)
chromosphere
c)
radiation zone
d)
convection zone
4.
The temperature of the sun's core is close to
a)
15 million degrees C
b)
3 million degrees C
c)
6,000 degrees C
d)
100 degrees C
5.
Which layer of the sun is the hottest?
a)
Photosphere
b)
Chromosphere
c)
Corona
d)
Core
6.
The particles of the corona extends into space for millions of kilometers and spreads into streams of electrically charged particles called:
a)
coronal discharge
b)
solar flares
c)
coronal ejection
d)
solar winds
7.
Why are sunspots darker than the surrounding areas?
a)
The hotter gas releases less light
b)
The Cooler gas releases less light
c)
They look that way because the light form the sun
d)
They are created by shadows from the moon.
8.
Which of the following best explains why the Sun can provide energy for billions of years?
a)
The Sun's core is made of infinite hydrogen.
b)
Nuclear fusion releases more energy than chemical combustion.
c)
The Sun continuously absorbs energy from space.
d)
The Sun's energy is replenished by nearby stars.
9.
Why does the sun shine?
a)
its on fire
b)
chemical energy
c)
gravitational energy
d)
nuclear fusion
10.
What condition are required for nuclear fusion of hydrogen to occur?
a)
a temperature of millions of Kelvins and high density
b)
a temperature of millions of Kelvins and low density
c)
the presence of uranium
d)
all of the above
Reset
