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Waves (A wave is a disturbance (Forces and Waves (Rope wave (Apply one…

- - - - Apply one force to the rope by flicking it upward and an opposite force when you snap it back down.
      - Sends a wave through the rope.
      - Both forces-the one that moves the rope up and the one that moves the rope down-are required to start a wave.
    - - Calm pool of water and dip your finger into it.
      - The water rushed back after you remove your finger.
      - The force of your finger and the force of the water rushing back send waves across the pool
    - - An earthquake is a sudden release of energy that has built up in rock as a result fo the surrounding rock pushing and pullling it.
      - When these two forces cause the rock to suddenly break away and move, the energy is transferred as a wave through the ground.