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GCSE Combined Science · key term
A substance formed in a chemical reaction.
Used by AQA and Edexcel
Specification 4.4.1.1, 5.1.1.1, 5.3.1.1, 5.5.1.1 · Paper 1, Paper 3
Revise: Photosynthetic ReactionIn leaves, energy transferred by light enables carbon dioxide and water to react and form the products.
A substance formed during a chemical reaction.
Specification Formulae, equations and hazards · Paper 3, Paper 4
Revise: Chemical formulae and equationsChemical equations describe a change from reactants, the starting substances, to products, the substances formed. A word equation names these substances; a symbol equation represents them using chemical formulae. To write a useful symbol equation, you need to know what each formula means before you balance it.
Keep the reactants and products in the correct order: carbon dioxide and water form glucose and oxygen.
Identify reactants and products from the meaning of the question: they may not be mentioned in that order.
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