level 1
What is the primary tool used to analyze a star's light spectrum?
a. Microscope
b. Spectroscope
c. Telescope
d. Binoculars
Answer: b. Spectroscope
Which unit measures distances between stars?
a. Kilometers
b. Light years
c. Astronomical units
d. Miles
Answer: b. Light years
What is the Sun’s luminosity compared to other stars?
a. Higher because it’s larger
b. Lower because it’s cooler
c. Higher because it’s closer
d. The same as other stars
Answer: c. Higher because it’s closer
Spectroscope..................
Splits light into a spectrum
Explain how scientists use the electromagnetic spectrum to study stars.
Answer: Scientists use the electromagnetic spectrum to study the light emitted by stars. By analyzing the spectrum with a spectroscope, they can determine a star's composition, temperature, and motion.
What is the average distance from Earth to the Sun?
a. 1 light year
b. 1 astronomical unit
c. 10 million miles
d. 5.88 trillion miles
Answer: b. 1 astronomical unit
What does apparent magnitude measure?
a. The energy output of a star
b. How bright a star appears from Earth
c. The distance of a star
d. The color of a star
Answer: b. How bright a star appears from Earth
What unit is most useful for measuring distances within our solar system?
a. Light years
b. Miles
c. Astronomical units
d. Parsecs
Answer: c. Astronomical units
Apparent Magnitude
How bright a star appears from Earth
Why are light years used instead of miles to measure distances in space?
Answer: Light years are used because distances in space are so vast that using miles would result in extremely large and impractical numbers.
What does a light year measure?
a. Time
b. Distance
c. Weight
d. Energy
Answer: b. Distance
What determines a star's luminosity?
a. Its distance from Earth
b. Its size and temperature
c. Its color
d. Its speed
Answer: b. Its size and temperature
What information can a star’s spectrum reveal?
a. Its age
b. Its temperature and composition
c. Its size
d. Its location
Answer: b. Its temperature and composition
Light Year
Distance light travels in one year
What is the difference between apparent magnitude and luminosity?
Answer: Apparent magnitude measures how bright a star appears from Earth, while luminosity measures the total amount of energy a star emits.
What part of the electromagnetic spectrum is visible to humans?
a. Ultraviolet
b. Infrared
c. Visible light
d. X-rays
Answer: c. Visible light
What is one astronomical unit in miles?
a. 1 million miles
b. 5.88 trillion miles
c. 93 million miles
d. 1 billion miles
Answer: c. 93 million miles
Which star appears brighter to us, the Sun or Sirius?
a. Sirius
b. The Sun
c. Both are the same
d. Neither
Answer: b. The Sun
Luminosity
Total energy output of a star
Total energy output of a star
Why is the Sun brighter to us than other stars, even though some stars have higher luminosity?
Answer: The Sun appears brighter because it is much closer to Earth than other stars, even though some stars emit more energy.
How do scientists determine a star’s composition?
a. By its brightness
b. By its temperature
c. By its spectrum
d. By its size
Answer: c. By its spectrum
Which tool helps measure a star’s motion toward or away from Earth?
a. Spectroscope
b. Telescope
c. Radio dish
d. Microscope
Answer: a. Spectroscope
How do scientists study distant galaxies?
a. By measuring apparent magnitude
b. By using light years to calculate distances
c. By counting the stars in the galaxy
d. By estimating its mass
Answer: b. By using light years to calculate distances
Astronomical Unit (AU)
Average distance between Earth and the Sun
How does the spectrum of a star reveal its motion?
Answer: By observing shifts in the spectrum (redshift or blueshift), scientists can determine whether a star is moving toward or away from Earth