Free Year 8 Science practice — examine Dalton’s model and diffusion in living systems. No account needed.
Evaluate selected claims in Dalton’s atomic model and explain diffusion examples in plants and the body. 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: Distinguish scientific models from literal structure and trace net particle movement down concentration gradients.
Curriculum anchor: England KS3 Science: simple atomic model; development of scientific ideas; diffusion in matter and living 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.
Ask which part is a model, which evidence later refined it, and where each diffusion gradient begins and ends. 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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