WorksheetsStar Test Review
Total questions: 20
Worksheet time: 16mins
The lifetime of a star depends on its:
temperature
absolute brightness
apparent brightness
mass
A star is born when:
a nebula expands
nuclear fusion starts
helium and oxygen combine
a protostar begins to school
The Hertzsprung-Russell diagram shows that main-sequence stars:
increase in brightness as they increase in temperature
are mostly hot and dim
decrease in brightness as they increase in temperature
are mostly cool and bright
The brightness of a star depends on its:
distance and temperature
color and temperature
distance and color
size and temperature
More than half of all stars are members of groups of two or more stars called:
star clusters
eclipsing binaries
galaxies
star systems
Characteristics used to classify stars include:
size, distance, and brightness
distance, size, and color
size, brightness, and temperature
color, brightness, and distance
What color are the coolest stars?
red
blue-white
orange
yellow
The force that tends to pull together the matter in stars is:
dark energy
gravity
nuclear fusion
dark matter
All stars begin as part of a large cloud of gas and dust called a(n):
protostar
nebula
white dwarf
super giant
Most stars are in the _________ _________ stage of their life.
white dwarf
giant
main sequence
super giant
The most massive stars collapse to form _________ when they die.
white dwarfs
giant
super giant
black holes
A protostar becomes a star when energy is released by the process of _________.
gravity
dark energy
nuclear fusion
dark matter
When using a Bunsen burner, after it is lit you should immediately open the air vents.
True
False
When the air vents are closed you have a hot flame (double cone).
True
False
By looking at a flame on a Bunsen burner you can tell whether or not the air vents are opened or closed.
True
False
The gas we use to light a Bunsen burner is naturally odorless.
True
False
Using the figure, name the star that is very dim and red in color.
Barnard's Star
Mira
Betelgeuse
Alpha Centauri A
Name the stars on the diagram that are blue or blue-white.
Algol, Van Maanen, and Deneb
Canopus, Procyon, and Sun
Mira, Betelgeuse, and Barnard's Star
Algol, Regulus, and Spica
Describe the features of the star Deneb.
Bright, white in color, 10,000 C
Dim, yellow in color, 6,000 C
Semi-bright, white in color, 8,000 C
Bright, blue-white in color, 20,000 C
When a star begins to run out of fuel, what two types of stars can it become?
Supernova or Neutron Star
White dwarf or Supernova
Red Giant or Supergiant
Supernova or Black Hole
