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Ninth Grade (Grade 9) Astronomy Questions

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Grade 9 Sun
What is the correct order of the layers of the Sun's atmosphere in order of innermost layer to outermost layer?
  1. corona, photosphere, chromosphere
  2. photosphere, corona, chromosphere
  3. photosphere, chromosphere, corona
  4. chromosphere, photosphere, corona
Grade 9 Outer Planets
What is Saturn's most prominent feature?
  1. moon system
  2. ring system
  3. giant storm
  4. liquid oceans
Grade 9 Sun
A dark spot on the Sun, which is cool by contrast to the surrounding photosphere.
  1. Solar Wind
  2. Solar Flare
  3. Sun Darkening
  4. Sunspot
Grade 9 Stars
This diagram would be most useful for
H-R Diagram With Text Labels - Small
  1. locating stars.
  2. classifying stars.
  3. locating galaxies.
  4. classifying galaxies.
Grade 9 Stars
Which is NOT true about a protostar?
  1. It is usually much larger than it will be as a star.
  2. It glows due to the heat of the gases in its core.
  3. It may become a brown dwarf.
  4. It generates pressure by fusing hydrogen.
Grade 9 The Moon
How long does the lunar cycle last?
  1. 7 days
  2. 14.75 days
  3. 29.5 days
  4. 45 days
Grade 9 Planetary Motion
One day on Mercury is equal to about 59 Earth days. Which statement best explains this phenomena?
  1. Mercury rotates slower than Earth.
  2. Mercury revolves faster than Earth.
  3. Earth is farther from the Sun than Mercury.
  4. Earth has a lower orbital eccentricity than Mercury.
Grade 9 Planetary Motion
Earth rotates once on its axis about every                .
  1. hour
  2. 27-1/2 days
  3. 24 hours
  4. 12 months
Grade 9 Planetary Motion
What is represented by the diagram below?
Neap Tide
  1. neap tide
  2. spring tide
  3. solar eclipse
  4. lunar eclipse
Grade 9 Stars
A red giant is formed when
  1. a star begins fusing helium.
  2. a star begins fusing hydrogen.
  3. binary stars merge.
  4. a star begins burning its hydrogen shell.
Grade 9 Stars
The lifespan of a star will depend mainly on its
  1. temperature.
  2. brightness.
  3. mass.
  4. magnitude.
Grade 9 The Moon
The Moon is about                 the size of Earth.
  1. one-tenth
  2. one-fourth
  3. one-half
  4. one-fifth
Grade 9 Inner Planets
The predominant component of the atmosphere of the planet pictured is                .
Planet Venus - Small
  1. oxygen
  2. nitrogen
  3. carbon dioxide
  4. carbon monoxide
Grade 9 Space Exploration
Which telescope detects wavelengths other than visible light?
  1. refractor telescope
  2. reflector telescope
  3. composite telescope
  4. radio telescope
Grade 9 Small Bodies and Dwarf Planets
What is an asteroid made of?
  1. rock and carbon
  2. rock and ice
  3. rock and lava
  4. rock and precious metal
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