1) 1. Which is the chemical change? a) Water turning to steam when boiled b) An ice cube melting c) Magnesium burning d) Melting chocolate 2) Which is the physical change? a) Process of digestion b) Melting candle wax c) Acid and metal reacting d) Bread being toasted 3) What is a reactant? a) Something that reacts during a chemical reaction b) Something that is made when a chemical reaction happens c) Something that does not react or change during a chemical reaction d) The only thing that changes in a chemical reaction 4) What is a product? a) Something that reacts during a chemical reaction b) Something that is made when a chemical reaction happens c) Something that does not react or change during a chemical reaction d) The only thing that changes in a chemical reaction 5) What are signs a chemical reaction has taken place? a) Colour change b) temperature change c) bubbles or fizzing d) All of these 6) Which is true about physical changes? a) They are always reversible b) They are usually easily reversible c) The changes are usually permanent and so irreversible d) New substances are made 7) Which is true about chemical changes? a) They are always reversible b) They are usually easily reversible c) The changes are usually permanent and so irreversible d) No new substances are made

CHEMICAL CHANGES Year 7

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