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Ninth Grade (Grade 9) Solar System Questions

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Grade 9 Outer Planets
Unlike the other planets, the axis of Uranus is                      .
  1. upside down
  2. almost horizontal
  3. completely vertical
  4. tilted at a 23° angle
Grade 9 Sun
Grade 9 Planetary Motion
A solar eclipse may occur when
  1. the Moon is between Earth and the Sun.
  2. Earth is between the Moon and the Sun.
Grade 9 Sun
A sudden and tremendous eruption in the solar chromosphere.
  1. solar flare
  2. solar wind
  3. solar darkening
  4. sunspot
Grade 9 Planetary Motion
Which of the following is not one of Kepler's Laws of planetary motion?
  1. The orbit of every planet is an ellipse with the Sun at a focus.
  2. A line joining a planet and the Sun sweeps out equal areas during equal intervals of time.
  3. When viewed in an inertial reference frame, an object either is at rest or moves at a constant velocity, unless acted upon by an external force.
  4. The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.
Grade 9 Outer Planets
These planets are also known as gas giants.
  1. Terrestrial planets
  2. Jovian planets
  3. Inferior planets
  4. Superior planets
Grade 9 Small Bodies and Dwarf Planets
What is a dwarf planet?
  1. nearly round, orbits Sun, has cleared its neighborhood of debris
  2. nearly round, does not orbit Sun and has cleared its neighborhood of debris
  3. nearly round, orbits Sun, has not cleared its neighborhood of debris
Grade 9 Outer Planets
Which planet is noted for its Great Red Spot?
  1. Neptune
  2. Jupiter
  3. Saturn
  4. Uranus
Grade 9 Inner Planets
Which is the smallest inner planet?
  1. Sun
  2. Mars
  3. Venus
  4. Mercury
  5. Earth
Grade 9 Planetary Motion
Grade 9 Planetary Motion
The shape of a planet's orbit.
  1. Albedo
  2. Ellipse
  3. Transit
  4. Aphelion
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