Identifies chemical reactions by changes in appearance of a substance including Through experimentation, I can identify indicators of colour change, precipitate formation, release of gas, and / or a detectable energy chemical reactions having change. occurred. I can describe Gives examples of everyday chemical reactions, for example, rusting, ways of controlling the rate neutralisation and combustion. of reactions and can relate States that a physical change does not result in a new substance formed. my findings to the world examples of at least two physical changes, for example, changes of state, around me. dissolving, distilling and crystallisation. SCN 3-19a Describes the difference between a chemical reaction and a physical change. Investigates and describes the effect of particle size, concentration and temperature on the rate of a reaction. States that decreased particle size, increased concentration and increased temperature can increase the speed of a reaction. States that catalysts are substances that speed up a chemical reaction but can be recovered unchanged. Provides at least one example of a reaction involving a catalyst, for example, manganese dioxide on the breakdown of hydrogen peroxide. States that an enzyme is a biological catalyst allows chemical reactions to occur quickly in living organisms. Provides at least one example of a reaction involving an enzyme, for example, amylase on starch. Describes the economic importance of catalysts to industry, for example, reducing energy costs.
Through experimentation, I can identify indicators of chemical reactions having occurred. I can describe ways of controlling the rate of reactions and can relate my findings to the world around me. SCN 3-19a Identifies chemical reactions by changes in appearance of a substance including colour change, precipitate formation, release of gas, and / or a detectable energy change. Gives examples of everyday chemical reactions, for example, rusting, neutralisation and combustion. States that a physical change does not result in a new substance formed. examples of at least two physical changes, for example, changes of state, dissolving, distilling and crystallisation. Describes the difference between a chemical reaction and a physical change. Investigates and describes the effect of particle size, concentration and temperature on the rate of a reaction. States that decreased particle size, increased concentration and increased temperature can increase the speed of a reaction. States that catalysts are substances that speed up a chemical reaction but can be recovered unchanged. Provides at least one example of a reaction involving a catalyst, for example, manganese dioxide on the breakdown of hydrogen peroxide. States that an enzyme is a biological catalyst allows chemical reactions to occur quickly in living organisms. Provides at least one example of a reaction involving an enzyme, for example, amylase on starch. Describes the economic importance of catalysts to industry, for example, reducing energy costs.
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