| Reading | Value | Reference | Result |
|---|
A teaching model, not a clinical tool. Skin production uses rough averages for arms and legs uncovered at midday; real production varies a lot between people, clouds, altitude and time of day. Time is sped up: one second is about two weeks. Dietary calcium is held at 1,000 mg a day. Sun advice should also protect against skin cancer.
| Reading | Value | Meaning |
|---|
A teaching model. Real dark adaptation takes about 20 to 30 minutes; here it is sped up to seconds. Rod sensitivity is shown simply as the share of rhodopsin ready to catch light.
Number problems: the worked solution builds in the picture after a correct answer, or when you ask for it, with units cancelling (struck through in red). Predict-then-watch problems: answer first, then the animation plays.
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.
Fictional people. Teaching scenarios with rounded values, not personal medical or diet advice.
Wrong picks are fine here. Each one tells you why.