We see things move every day., , Birds fly in the sky., , Leaves fall to the ground., , Things move up and down., , A force makes things move., , We can push a box., , We can pull a wagon., , A small force makes a small movement., , A big force makes a big movement., , We can throw a ball., , A toy car is light., , A real car is heavy., , It is easier to move a light thing., , Speed is how fast things move., , A train has high speed., , A tortoise moves slowly., , A big force can change speed., , A door opens slowly with a small force., , A door opens quickly with a big force., , Things move in many ways., .

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