#1
Which of the following is a characteristic used to classify stars?
Color
ExplanationStar classification relies on color.
#2
What is the HR diagram primarily used for?
Classifying stars based on their temperature and luminosity
ExplanationHR diagram: temperature and luminosity classification.
#3
What does the term 'stellar parallax' refer to in astronomy?
The apparent shift in a star's position due to Earth's orbit
ExplanationStellar parallax: apparent shift due to Earth's orbit.
#4
What phenomenon does the term 'stellar wind' refer to?
The flow of charged particles from a star into space
ExplanationStellar wind: flow of charged particles into space.
#5
What does the term 'nebula' refer to in astronomy?
A cloud of gas and dust in space
ExplanationNebula: gas and dust cloud in space.
#6
What does the term 'stellar evolution' refer to in astronomy?
The process by which a star forms from a nebula and changes over its lifetime
ExplanationStellar evolution: star formation and changes over time.
#7
Which type of star has the highest surface temperature?
Blue supergiant
ExplanationBlue supergiants: highest surface temperature.
#8
What does the main sequence represent on the HR diagram?
Stars undergoing nuclear fusion of hydrogen into helium
ExplanationMain sequence: hydrogen to helium fusion.
#9
What is the approximate temperature range of a red giant star?
3,000 K - 4,000 K
ExplanationRed giants: 3,000 K to 4,000 K temperature range.
#10
Which of the following stars is likely to have the longest lifespan?
White dwarf
ExplanationWhite dwarfs: longest lifespan.
#11
What is the primary factor determining a star's evolution on the HR diagram?
Mass
ExplanationStar's evolution on HR diagram: primarily mass dependent.
#12
Which type of star is formed from the remnants of a supernova explosion?
Neutron star
ExplanationNeutron stars: formed from supernova remnants.
#13
What does the term 'luminosity' refer to in astronomy?
The actual brightness of a star
ExplanationLuminosity: actual brightness of a star.
#14
In the HR diagram, where would you find stars that are undergoing helium fusion?
Red giants
ExplanationHelium fusion: red giants.
#15
Which property of a star is primarily responsible for its position on the HR diagram?
Temperature
ExplanationHR diagram position: primarily temperature driven.
#16
What is the approximate temperature range of a white dwarf star?
5,000 K - 6,000 K
ExplanationWhite dwarfs: 5,000 K to 6,000 K temperature range.
#17
Which region of the HR diagram contains stars that have exhausted their nuclear fuel?
White dwarfs
ExplanationWhite dwarfs: stars exhausted nuclear fuel.
#18
What is the approximate temperature range of a blue supergiant star?
15,000 K - 40,000 K
ExplanationBlue supergiants: 15,000 K to 40,000 K temperature range.