| Measure | Value |
|---|
Identification questions show their drawing right away. Calculation and prediction questions hide the picture until you answer (or press Show me); then a worked solution or the matching animation plays, with units cancelling (struck through in red).
Your job
Drag a card onto a box, or tap a card and then tap the box's name. Cards are buttons, so Tab and Enter work too.
Data are rounded, illustrative teaching values in line with published trends, not results from one specific study.
Wrong picks are fine here. Each one tells you why.