Two north poles face each other. What happens?
Two objects face each other: do they pull together, or push apart? You now hold all three rules. The whole skill is picking the right rule for the right field.
Read what the objects carry: poles, charges, or just mass. Then the rule follows.
Two north poles: like poles, so they repel. But a north pole and a south pole: unlike poles, so they attract.
Two negative charges: like charges, so they repel. But a positive and a negative charge: unlike charges, so they attract. And two masses: masses always attract, because gravity has no repel case.
One question starts every sort: what do the two objects carry?
A magnet's south pole faces another magnet's south pole. Do the poles attract or repel?
South and south are like poles.
Like poles repel.
The poles repel.
Two boulders rest near each other on a hillside. Do the boulders attract or repel?
The south poles of two toy magnets face each other. Do the poles attract or repel?
Two more pairs. Name what each pair carries, then apply that field's rule.
Two combs each carry negative charge. Do the combs attract or repel?
A balloon with negative charge hangs beside a balloon with positive charge. Do the balloons attract or repel?
Last two pairs: read the pair, pick the rule.
A magnet's north pole faces another magnet's south pole. Do the poles attract or repel?
Two glass rods each carry positive charge. Do the rods attract or repel?
Which pair repels?
Which pair attracts, no matter which two objects are picked?
Two plastic streamers hang from a stick, both carrying negative charge. They drift apart. Why?