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IGCSE Science Command Words
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Module 1
Linear 4SD0 Command Words and Mark-Scheme Thinking
1
Determining Answer Scope from Command Words and Mark Allocation
Determine an answer's required scope from the command word, mark allocation, supplied information and answer space without assuming that every mark requires a separate sentence.
2
Providing Concise Scientific Facts
Respond to “name”, “state”, “give” and “identify” with concise scientific facts that match the scope of the question.
3
Writing Precise Scientific Definitions
Write precise scientific definitions when the command word is “define”.
4
Describing Features, Trends, and Sequences Accurately
Answer “describe” questions by reporting relevant features, trends or sequences without adding unsupported causes.
5
Linking Causes, Mechanisms, and Effects in Explanations
Answer “explain” questions with linked cause–mechanism–effect statements.
6
Comparing Similarities and Differences by Feature
Answer “compare” questions using paired similarities or differences about the same feature.
7
Mastering Calculations: Equations, Substitutions, Units and Rounding
Set out equations, substitutions, units, significant figures and rounding for “calculate”, “determine”, “estimate” and “show that” questions.
8
Answering Deduce, Suggest, and Predict Science Questions
Answer “deduce”, “suggest” and “predict” questions by combining known science with information supplied in an unfamiliar context.
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