Motion & Stability

Students will...

PS.4.1 Understand how various forces affect the motion of an object.
- PS.4.1.1 Ask questions to summarize the relationship of magnetic interactions between two objects not in contact with each other.
- PS.4.1.2 Carry out investigations to explain how electrically charged objects push or pull on other objects to produce motion.

Force & Motion: Magnets and Electric Charge

Forces: Magnetism

Magnetic Forces

The Science Behind Magnets

Do Opposites Attract

Static Electricity

Students will understand that...

PS.4.1.1

Students recognize the difference between contact and non-contact forces.
Students know a magnet pulls on all things made of iron (and some other magnetic metals) without contact, and that this pulling can result in motion (e.g., two permanent magnets, an electromagnet and paper clips).
Student classify objects as magnetic or non-magnetic, noting some patterns such as many metals being magnetic.
Students explain the size of the force (push or pull) depends on the force exerted (e.g. one magnet versus the force exerted by two magnets) and the distance between the object and the magnet.
Students know a magnet has two poles; the like poles repel (push), unlike poles attract (pull).

PS.4.1.2

Students recognize the difference between contact and non-contact forces.
Students know an object that has been electrically charged pulls or pushes on all other charged objects and that this can result in motion.
Students know charged objects with like charges repel, and unlike charges attract.
Students know that electrical charges can result in attraction, repulsion or electrical discharge (e.g., lightning, static electricity).

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