Free Year 7 Science practice — trace airflow, explain ventilation, test a model and interpret lung evidence. No account needed.
Trace breathing-system structures, explain ventilation, evaluate the bell-jar model and interpret supplied lung-volume evidence. The default practice mode is untimed, so the learner can think before choosing. Correct answers build a gentle celebration; mistakes receive corrective feedback and return later rather than causing a penalty spiral.
Learning objective: Link structures to gas exchange, use pressure and volume to explain breathing, evaluate model limits and draw cautious conclusions from supplied data.
Curriculum anchor: England KS3 Science: gas exchange systems; the mechanism of breathing; and effects of lifestyle and disease on body systems.
This game is designed as short independent practice after an idea has been introduced. It does not replace direct teaching, mathematical or scientific discussion, or an adult checking whether the learner can explain the idea away from the screen.
Keep ventilation distinct from gas exchange and treat classroom lung data as evidence to interpret, never as a diagnosis. Stop while attention is still good. A short accurate return tomorrow is more useful than extending a tired session today.
Does it need an account? No. The game runs in the browser and asks for no name, email address, school or location.
Is it timed? Practice is untimed. Where a sprint exists it is optional. Times Tables Sprint also includes MTC-style independent practice, not an expected-standard judgement.
Can it be used on a phone? Yes. Buttons support touch and keyboard use; sorting always has a tap alternative to dragging.
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