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The Apple Falls

Earth pulls every object toward its center. That pull gives an apple its weight and makes it speed up as it drops.

In the picture

  1. The falling apple: pulled downward by Earth’s gravity
  2. The dotted arc: the path the apple follows as it drops
  3. The arrow: the direction of the pull, straight toward Earth’s center
  4. The ground below the apple: Earth’s surface, which the apple is pulled toward

Examples

  • A ball let go from your hand gets faster and faster until it hits the floor.
  • A book resting on a table presses down with its weight.

Quiz: The Apple Falls (Age 13)

  1. According to the card, in which direction does Earth’s gravity pull objects?

    • Toward Earth’s center
    • Sideways along Earth’s surface
    • Away from Earth’s center
  2. What happens to a falling object’s speed because of Earth’s pull?

    • It speeds up as it drops
    • It slows down as it drops
    • It stays at the same speed
  3. According to the card, why does an apple have weight?

    • Because the ground pushes it upward
    • Because air holds it up
    • Because Earth pulls it toward its center

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.

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Science, Age 13