Teaching article
Flat paper and crumpled paper: ask what changed
Separate observations about falling from claims about weight alone.
Equal amounts of the same paper can behave differently while falling. Keeping the paper quantity constant directs attention to shape and interaction with air, rather than using the result to claim that a larger-looking object must fall faster.
Equal paper amounts can fall differently when their shapes differ.
Same paper, different shape
- Keep one sheet flat.
- Crumple the other.
- Release together from a low height.
Use the same paper amount to keep the comparison focused. Explain that the investigation changes shape rather than the amount of material.
Shape affects interaction with air.
What changed besides shape? Watch an educator demonstration.
Resources
- Paper aircraft test – Forces and Flight Major Activity — Use the aircraft investigation for a follow-up comparison with a recorded procedure.
Further reading
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