SIKALIAS WHY LAB · EPISODE 05 · 4–7 · 6:57

How do we know?

Eirini, Nefeli and Pico turn a puzzle about two sheets of paper into a question, a prediction and a careful comparison. They distinguish what they observed from what they imagined, and learn that an idea can change when they learn something new.

Watch the story

Two narrations and 13 subtitle languages. Watch with a grown-up.

Open the family player

For grown-ups

Watch the story together. The paper comparison is an illustrated example, not a recording of a measured experiment. Shape and orientation affect air resistance; crumpling the same sheet adds no mass and does not prove that heavier objects always fall faster. We do not grade predictions. Observation, drawing and conversation are enough.

Away from the screen

Close the screen and, with a grown-up, say, point to or draw a question, what you expect, what you observed and what you think now. No touching or tasting is needed. Only the adult handles the optional paper test, releasing both sheets from the same low height without pushing or blowing, in a clear, dry space with no chairs or climbing.

Open the question notebook

Questions to discuss

  • What did you expect to happen?
  • What did you observe?
  • What stayed the same in the test?
  • Which result was unclear?
  • Did your idea change?
Parent note · Scientific sources and limits