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Ninth Grade (Grade 9) Astronomy Questions

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Grade 9 Inner Planets
When the solar system formed, which planets lost most of their gases to the sun?
  1. the inner planets
  2. the comets
  3. the outer planets
  4. the asteroids
Grade 9 Universe
What is the leading explanation about how the universe began?
  1. Multiverse Theory
  2. Big Bang Theory
  3. Hubble Theory
  4. Interstellar Medium
Grade 9 Outer Planets
What is the name of the region where icy bodies that lie beyond Neptune's orbit?
  1. The Kuiper Belt
  2. The Oort Cloud
  3. The Outer Asteroid Belt
  4. All of the Above
Grade 9 Planetary Motion
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 Astronomy
Grade 9 Small Bodies and Dwarf Planets
Which of the following is NOT a possible source of meteoroids?
  1. solid remains of comets that once traveled near Earth's orbit
  2. gassy ices that were not incorporated into the planets
  3. material from the asteroid belt
  4. interplanetary rocks and metals that was not incorporated into the planets
Grade 9 Stars
Which area of Earth science includes the study of stars?
  1. meteorology
  2. hydrology
  3. geology
  4. astronomy
Grade 9 Planetary Motion
The gravitational attraction between sun, moon, and Earth
  1. causes tides
  2. causes seasons to change
  3. causes a full moon
Grade 9 Universe
Grade 9 Inner Planets
Select the letter of Mercury's position in the solar system.
  1. innermost terrestrial planet
  2. innermost Jovian planet
  3. outermost terrestrial planet
  4. outermost Jovian planet
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 the Earth
  2. Mercury revolves faster than the Earth
  3. Earth is farther from the Sun than Mercury
  4. Earth has a lower orbital eccentricity than Mercury
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
Grade 9 Outer Planets
Io is a moon of
  1. Mars
  2. Venus
  3. Jupiter
  4. the moon
Grade 9 Planetary Motion
Grade 9 Solar System
How did the solar system form?
  1. an expanding galaxy
  2. cloud of gas and dust pulled together by gravity
  3. an enormous explosion
  4. a black hole's gravity
Grade 9 Universe
How long ago did the Big Bang happen?
  1. 10,000 years ago
  2. 13.7 billion years ago
  3. 13.7 million years ago
  4. 13.7 trillion years ago
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