#1
Which of the following is a characteristic used to classify stars?
Color
Shape
Temperature
Distance from Earth
#2
What is the HR diagram primarily used for?
Classifying stars based on their temperature and luminosity
Measuring the distance between stars
Determining the age of a star
Studying the composition of a star's atmosphere
#3
What does the term 'stellar parallax' refer to in astronomy?
The apparent shift in a star's position due to Earth's orbit
The apparent brightness of a star as seen from Earth
The distance of a star from Earth
The color of a star
#4
What phenomenon does the term 'stellar wind' refer to?
The flow of charged particles from a star into space
The rapid expansion of a star's outer layers during a supernova
The fusion of hydrogen into helium within a star's core
The gravitational collapse of a star into a black hole
#5
What does the term 'nebula' refer to in astronomy?
A cloud of gas and dust in space
A small planet
A comet
A type of star cluster
#6
What does the term 'stellar evolution' refer to in astronomy?
The change in a star's position in space over time
The process by which a star forms from a nebula and changes over its lifetime
The study of stars within a galaxy
The process of a star turning into a black hole
#7
Which type of star has the highest surface temperature?
Red giant
White dwarf
Main sequence star
Blue supergiant
#8
What does the main sequence represent on the HR diagram?
The phase of a star's life when it is forming
The most common type of star
Stars with the highest luminosity
Stars undergoing nuclear fusion of hydrogen into helium
#9
What is the approximate temperature range of a red giant star?
3,000 K - 4,000 K
5,000 K - 6,000 K
7,000 K - 8,000 K
9,000 K - 10,000 K
#10
Which of the following stars is likely to have the longest lifespan?
Blue supergiant
Yellow dwarf
Red giant
White dwarf
#11
What is the primary factor determining a star's evolution on the HR diagram?
Color
Temperature
Luminosity
Mass
#12
Which type of star is formed from the remnants of a supernova explosion?
Neutron star
Main sequence star
Red giant
White dwarf
#13
What does the term 'luminosity' refer to in astronomy?
The apparent brightness of a star as seen from Earth
The actual brightness of a star
The color of a star
The distance of a star from Earth
#14
In the HR diagram, where would you find stars that are undergoing helium fusion?
Main sequence
Red giants
White dwarfs
Blue supergiants
#15
Which property of a star is primarily responsible for its position on the HR diagram?
Mass
Radius
Temperature
Luminosity
#16
What is the approximate temperature range of a white dwarf star?
3,000 K - 4,000 K
5,000 K - 6,000 K
7,000 K - 8,000 K
9,000 K - 10,000 K
#17
Which region of the HR diagram contains stars that have exhausted their nuclear fuel?
Main sequence
Red giants
White dwarfs
Blue supergiants
#18
What is the approximate temperature range of a blue supergiant star?
3,000 K - 4,000 K
5,000 K - 6,000 K
15,000 K - 40,000 K
50,000 K - 100,000 K