—·Chemistry · GCSE
GCSE Chemistry Questions & Model Answers
A student who reaches 9.75 g instead of 10 g because they forgot the hydrogen keeps two of the three marks — and one who writes 10 g with no working keeps none. That is error carried forward, and it is worth more marks in chemistry than in any other subject on the timetable. Every calculation here is marked step by step, each step saying what it still earns when the number coming into it is wrong; below six marks the schemes carry the allow and do not accept lines a real scheme has, and at six they become level descriptors.
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