Kansas Grade 3 Science

Change magnet orientation while keeping the comparison distance fixed

Plan an original magnet-orientation comparison, distinguish attraction from repulsion, identify controlled conditions, and study a Kansas Grade 3 magnetic-interaction expectation.

The Kansas science standards directory identifies NGSS adoption in 2013 and review in 2025. It links the disciplinary-core-idea arrangement used here. Use the Kansas-linked NGSS disciplinary-core-idea arrangement for the selected performance expectation and its complete supporting information. This activity selects a Grade 3 expectation. It is one part of a science course, not a complete curriculum.

Can turning one magnet change the direction of an interaction?

A teacher uses two marked classroom magnets in an approved setup that lets one move while keeping the starting gap consistent. The class compares facing unlike poles with facing like poles. Students first ask a question about what turning one magnet changes. The record below describes expected possibilities to test rather than report an experiment already completed. Magnets and small parts stay under the teacher’s handling rules.

Explain the evidence or model

Unlike poles attract, while like poles repel. In the planned comparison, turning one magnet changes which poles face while the starting gap and the two magnets stay the same. Movement toward or away from the other magnet can provide evidence of the interaction’s direction even before the objects touch. Compare the actual record with the planned pole labels instead of assume every observed motion means attraction. The teacher should check that marks identify the intended poles and that a support is not preventing the motion. A force can act without contact; an object’s visible movement also depends on how freely it can move.

What to check in the explanation

If orientation and starting distance change together, the trial does not isolate orientation as clearly. Moving the magnets closer can change the interaction’s strength, which is a different question from changing its direction. A stationary object does not prove that no magnetic force acts: friction or a support may prevent movement. Nor is every metal attracted strongly by an ordinary classroom magnet. The selected expectation includes magnetic interactions and static electric interactions, but this comparison addresses magnets only. Do not interpret it as a test of every metal, every electrical device, or the Earth’s magnetic field.

Plan the next activity

1. Ask how the facing poles affect the direction of an interaction.
2. Keep magnets and the starting gap consistent while changing orientation.
3. Describe actual movement and evaluate whether the comparison isolates the question.

Have a partner review a diagram of the starting positions and identify which condition changed. Then plan a separate distance comparison with pole orientation kept fixed. Record what is actually observed rather than create measurements to match an expected trend. A teacher can use a suitable nonmagnetic object as another comparison, explaining why changing both the object and setup at once complicates the claim. Kansas Grade 3 asks students to ask cause-and-effect questions within manipulable interactions. A clear question, a controlled plan, and an evidence-based explanation are more useful than simply memorizing that magnets stick together.