SME
Grade 3 Science · Physical Science
Magnetic and electric forces at a distance
Count the clips a magnet lifts through more sheets of paper, and see the pull weaken.
Record and look
12
9
6
4
3
2
0 sheets
1 sheet
2 sheets
3 sheets
4 sheets
5 sheets
0 sheets
1 sheet
2 sheets
3 sheets
4 sheets
5 sheets
Clips lifted (clips)
12
9
6
4
3
2
The more paper between, the fewer clips it lifts.
The pull is weaker farther away.
Tap a bar at the height you want.
Assumptions
•
A magnet pulls on iron without touching it.
•
Paper does not block the pull. It only adds distance.
•
Put sheets of paper between the magnet and the clips. Count the clips lifted.
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