Classroom mode
Run it in class
Why does a moving bike stay up?
Show of hands — before you project anything
What do all three choices predict about the same starting setup?
- A Way more than you'd guess
- B About what you'd guess
- C Way less than you'd guess
Count the votes out loud. Hold them to it — then watch.
Project it (fullscreen)
Discussion prompts
- What do all three choices predict about the same starting setup?
- Which general clue from the earlier pages applies to this new case?
- What would you hold fixed in a fair follow-up test?
Where it shows up in real life
- A child watches an empty blue bicycle roll across a park path while another bicycle rests nearby.
- A child slides a small board beneath a leaning stack of blocks before it can topple.
- The same child rides a blue bicycle calmly along the park path with both hands lightly on the bars.
A prediction-first worksheet — no answer key.
zero prep · no login · any projector
Winding down at home? Family mode ·
Explore every question
Why does a moving bike stay up?
Predict — what do you think will happen, and why?
Talk about it
- What do all three choices predict about the same starting setup?
- Which general clue from the earlier pages applies to this new case?
- What would you hold fixed in a fair follow-up test?