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4th grade - The Earth and the Universe

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  • How long does it take for the Earth to revolve around the sun?
    About 365 days. 1 year
  • What phase of the moon is it when you can't see the moon?
    A new moon
  • The movement that causes day and night
    rotation. The side facing the sun is daytime, the side facing away from the sun is night
  • How many phases of the moon are there?
    8
  • What is Earth's axis?
    An imaginary line running between the north and south pole that the earth spins around.
  • What is a crater?
    a bowl-shaped hole on the surface of an object in space. Often formed when another object crashes into it
  • What is a telescope?
    A telescope is a thing that uses lenses to make objects look like they are closer and bigger
  • How much more mass does the Earth have compared to the moon?
    81 times
  • When is a shadow long? When is it short?
    A shadow is longer when when the sun is lower in the sky. It is shorter when the sun is higher in the sky. Also the time of year.
  • What is a shadow?
    A dark spot created when an object blocks the light hitting it.
  • The main phases of the Moon
    new moon, first quarter, full moon, last quarter
  • What is called when you can see the full circle of the moon?
    A full moon.
  • How much greater is the Earth's volume than the moon's?
    49 times
  • This phase moon happens about a week after a new moon
    First quarter phase
  • Which direction does the Earth spin?
    The Earth spins counter clockwise.
  • The number of days that it takes to the moon to orbit the Earth
    27 days
  • How does the moon make light?
    It reflects the light of the sun
  • How many seasons are there? What are they?
    4. Spring, summer, fall (autumn), winter.
  • How long is the cycle of moon phases?
    29.5 days
  • What makes the sun rise and set?
    The sun stays in the same place relative to earth. Earth's spinning makes it look like the sun is moving.
  • What makes the moon have phases?
    Half the moon is always lit, and we can always see half the moon, but those two halves are not always the same halves
  • The 2 movements of the Earth
    Rotation and Revolution
  • How much bigger is Earth than the moon?
    4 times bigger
  • Why do we always see the same side of the moon?
    It takes the same amount of time to spin around (rotate) once as it takes to go around the Earth (revolve) once
  • This phase moon happens about 3 weeks after a new moon
    3rd quarter phase
  • The movement that causes the seasons of the year
    The revolution of the Earth around the sun combined with it's tilt
  • What kind of celestial body is the Sun
    A star