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Ninth Grade (Grade 9) Solar System Questions

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Grade 9 Planetary Motion
Earth is kept in orbit around the Sun by                                     .
  1. its speed and distance from the Sun
  2. inertia and gravity
  3. its shape and size
  4. electricity and magnetism
Grade 9 Sun
What lies at the center of our solar system?
  1. the Sun
  2. Mars
  3. Earth
  4. the Moon
Grade 9 Planetary Motion
What day is it when the Sun is at its lowest elevation in the sky all year and we experience the shortest day of the year?
  1. summer solstice
  2. winter solstice
  3. summer equinox
  4. winter equinox
Grade 9 Outer Planets
The rings of the planet pictured below are mainly made of what?
Planet Saturn - Small
  1. water ice
  2. helium gas
  3. liquid hydrogen
  4. frozen carbon dioxide
Grade 9 Planetary Motion
Planets that are close to the Sun
  1. move through the asteroid belt.
  2. orbit faster than the outer planets.
  3. orbit slower than the outer planets.
  4. move closer and closer to the Sun.
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 Small Bodies and Dwarf Planets
How are asteroids formed?
  1. They were formed when the solar system was formed.
  2. The planets' gravity pull them in and they start orbiting the sun.
  3. They are smaller portions of meteorites.
  4. They are smaller portions of comets.
Grade 9 Outer Planets
A characteristic of the outer planets is                               .
  1. they have many moons and rings
  2. they have rocky surfaces
  3. they are small in size
  4. none of the above
Grade 9 Planetary Motion
Earth's movement around the Sun is called its                  .
  1. precession
  2. retrograde motion
  3. revolution
  4. rotation
Grade 9 Outer Planets
What is the name of the region beyond Neptune's orbit where icy bodies lie?
  1. The Kuiper Belt
  2. The Oort Cloud
  3. The Outer Asteroid Belt
  4. All of the Above
Grade 9 The Moon
A lunar eclipse can only occur during which phase of the Moon?
  1. Quarter Moon
  2. New Moon
  3. Full Moon
  4. Crescent Moon
Grade 9 The Moon
When the Moon is on the opposite side of the Earth from the Sun, what could the phase of the Moon?
  1. New Moon
  2. New Gibbous Moon
  3. New Half Moon
  4. Full Moon
Grade 9 Planetary Motion
The Moon moves in a line directly between Earth and the Sun, casting a shadow on Earth.
  1. Solar Eclipse
  2. Lunar Eclipse
  3. Winter Solstice
  4. Earth Eclipse
Grade 9 Planetary Motion
How long does it take Earth to complete one revolution?
  1. 29.5 days
  2. 365.25 days
  3. 24 hours
  4. 72 hours
Grade 9 Planetary Motion
The change between day and night is caused by                             .
  1. Earth's rotation on its axis
  2. Earth's orbit of the Sun
  3. the Moon's orbit of Earth
  4. the Sun going down
Grade 9 Planetary Motion
What is an eclipse of the Moon, when the Moon passes through Earth’s shadow.
  1. Solar Eclipse
  2. Lunar Eclipse
  3. Summer Solstice
  4. Earth Eclipse
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