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3-PS2     Motion and Stability:  Forces and Interactions

3-PS2-1
Plan and construct an investigation to provide evidence of the effects of balanced and unbalanced forces on the motion of an object.
  • An unbalanced force on one side of a ball can make it start moving.
  • Balanced forces pushing on the box from both sides will not produce any motion at all.
  • Gravity is a force that pulls objects down.

3-PS2-2
Make observations and/or measurements of an object's motion to provide evidence that a pattern can be used to predict future motion.
  • Motion with a predictable pattern could include a child swinging in a swing, a ball rolling back and forth in a bowl, and two children on a see-saw.

3-PS2-3
Ask questions to determine cause and effect relationships of electric or magnetic interactions between two objects not in contact with each other.
  • An electric force could include the force on hair from an electrically charged balloon and the electrical forces between a charged rod and a piece of paper.
  • A magnetic force could include the force between two permanent magnets, the froce between an electromagnet and steel paperclips and the force exerted by two magnets.
  • Cause and effect relationships could include how the distance between objects affects strength of the force and how the orientation of magnets affects the direction of the magnetic force.

3-PS2-4
Define a simple design problem that can be solved by applying scientific ideas about magnets.
  • Problems can include constructing a latch to keep a door shut and creating a device to keep two moving objects from touching each other.
Hopper Popper Classroom Video VIMEO
Picture
Magnets 5 E Plan

MYSTERY SCIENCE

1. How can you beat an elephant at tug-o-war?

2. What makes bridges so strong?

3. How can you go faster down a slide?

4. What can magnets do?

SCIENCE MAX - Friction Video

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