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Physical Properties Of Stars
Test Description: Its my first test
Instructions: Answer all questions to get your test result.
1) Many stars are classified in terms of brightness, or
A
power.
B
age.
C
mass.
D
magnitude.
2) A ___ star has a greater temperature than a ___ star.
A
blue, red
B
yellow, blue
C
red, blue
D
red, yellow
3) Our sun is
A
a very small star.
B
a medium-sized star.
C
a very large star.
D
not actually a star at all.
4) Which process is occurring at the center of all active stars?
A
fusion
B
hydrogen decay
C
fission
D
flatulation
5) Which of these stars is the OLDEST?
A
nearly 0% iron
B
nearly 100% hydrogen
C
nearly 50% hydrogen
D
nearly 0% hydrogen
6) The process that fuels a star is BEST described as
A
hydrogen molecules being forced together by gravity.
B
helium molecules being burned by fire.
C
fission of helium molecules to form hydrogen.
D
fusion of helium molecules to form hydrogen
7) Star light, star bright: how bright a star appears to us on Earth depends MAINLY on
A
the age of the star.
B
the star's distance from the Sun.
C
the composition of the star.
D
the star's distance from Earth.
8) Luminosity is the amount of energy emitted by a star each second. Stars radiate light over a broad range of frequencies in the electromagnetic spectrum, from the low energy radio waves to high energy gamma rays. The luminosity of a star depends on tw
A
age and surface area.
B
distance from Earth and temperature.
C
surface area and temperature.
D
gravity and distance from Earth.
9) Scientists classify stars by colors: white, red, blue. The color of a star helps to tells us how ________ the star is.
A
hot
B
big
C
old
D
far
10) Many of the stars we see in the night sky are called blue giants. They put out more energy and burn millions of times brighter than the Sun. Why does the Sun appear much larger and brighter from Earth than blue giant stars?
A
It is a different color.
B
It is a different temperature.
C
It is closer.
D
It is larger.
*select an answer for all questions
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