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Ninth Grade (Grade 9) Astronomy Questions

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Grade 9 Planetary Motion
How long does it take Earth to complete a rotation?
  1. 29.5 days
  2. 365.25 days
  3. 24 hours
  4. 72 hours
Grade 9 The Moon
Why does the Moon have different phases?
  1. It moves around the Earth and we see different areas of the Moon’s surface lit up.
  2. It moves around the Sun and reflects light from the Sun.
  3. The distance between the Moon and the Earth changes.
  4. It rotates on its axis from East to the West.
Grade 9 Small Bodies and Dwarf Planets
Between what two planets is the asteroid belt located?
  1. Mercury and Earth
  2. Mars and Jupiter
  3. Jupiter and Saturn
  4. Earth and Mars
Grade 9 Planetary Motion
Day and night are caused by Earth's                .
  1. revolution
  2. rotation
  3. shape
  4. equator
Grade 9 Planetary Motion
If it is summer in the Northern Hemisphere, what is the orientation of the Southern Hemisphere to the Sun?
  1. pointing towards the Sun
  2. pointing away from the Sun
  3. pointing towards the Moon
  4. pointing away from the Moon
Grade 9 Stars
Two forces that are responsible for the creation of the solar nebula are
  1. gravity and pressure.
  2. magnetic force and weak force.
  3. gravity and strong force.
  4. strong force and magnetic force.
Grade 9 Planetary Motion
What is the shape of a planet's orbit?
  1. circular
  2. irregular
  3. elliptical
Grade 9 Sun
What do you call the outer and weak layer of the solar atmosphere?
  1. chromosphere
  2. solar flare
  3. solar wind
  4. corona
Grade 9 Stars
Distances to nearby stars can be determined from                 .
  1. fluorescence
  2. stellar parallax
  3. stellar mass
  4. emission nebulae
Grade 9 Sun
The process that makes solar energy is
  1. nuclear power.
  2. nuclear fusion.
  3. nuclear fission.
Grade 9 Space Exploration
This American astronomer developed observations of galaxies into a standard method of galaxy classification.
  1. Edwin Hubble
  2. Edmond Halley
  3. Charles Messier
  4. Giovanni Cassini
Grade 9 The Moon
What is the most popular theory on how the Moon formed?
  1. capture theory
  2. impact theory
  3. simultaneous formation theory
  4. magic theory
Grade 9 Planetary Motion
Select the letter of the two main motions of the Earth.
  1. rotation and precession
  2. rotation and revolution
  3. revolution and precession
  4. rotation and aphelion
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