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Seventh Grade (Grade 7) Planetary Motion Questions

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Grade 7 Planetary Motion
An equinox occurs when
  1. neither hemisphere is tilted toward or away from the sun.
  2. the Northern Hemisphere is tilted away from the sun.
  3. the Northern Hemisphere is tilted toward the sun.
  4. Earth's axis is parallel to the sun's rays.
Grade 7 Planetary Motion
The moon orbits the Earth at a slightly tilted angle compared to the Earth's orbit around the sun. This fact best accounts for which of the following?
  1. why there is a lunar eclipse every new moon
  2. why there is a solar eclipse every new moon
  3. why there is not a lunar eclipse every new moon
  4. why there is not a solar eclipse every new moon
Grade 7 Planetary Motion
Which is the best estimate of how frequently a total solar eclipse can be viewed from somewhere on Earth?
  1. once every 18 days
  2. once every 18 months
  3. once every 18 years
  4. once every 18 centuries
Grade 7 Planetary Motion
For a solar eclipse to occur,
  1. the sun must be directly between Earth and the moon
  2. the moon must be directly between Earth and the sun
  3. the moon must be directly behind Earth
  4. Earth must be directly between the sun and the moon
Grade 7 Planetary Motion
Grade 7 Planetary Motion
When the north end of the Earth's axis is tilted toward the sun, what will North America experience?
  1. more indirect rays and shorter days
  2. more indirect rays and longer days
  3. more direct rays and shorter days
  4. more direct rays and longer days
Grade 7 Planetary Motion
What must happen for a solar eclipse to occur?
  1. The moon must be directly behind the sun.
  2. Earth must be directly between the sun and the moon.
  3. The moon must be directly between the Earth and the sun.
  4. The sun must be directly between the Earth and the moon.
Grade 7 Planetary Motion
The position of the axis on Earth is important for which reason?
  1. night and day
  2. length of a year
  3. seasons
  4. position in the solar system
Grade 7 Planetary Motion
Imagine that gravitational force suddenly disappeared. Which best describes what Earth's path through space would look like?
  1. Earth would stop moving.
  2. Earth would move in a straight line through space.
  3. Earth would stop orbiting the sun and start orbiting the other planets.
  4. There would be no change in Earth's path through space.
Grade 7 Planetary Motion
Day and night are caused by
  1. The tilt of the Earth's axis
  2. Earth's revolution around the sun
  3. Eclipses
  4. Earth's rotation on its axis
Grade 7 Planetary Motion
One complete revolution of Earth around the sun takes about
  1. one rotation.
  2. one season.
  3. one year.
  4. one eclipse.
Grade 7 Planetary Motion
Grade 7 Planetary Motion
Grade 7 Planetary Motion
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