At the end of this unit
in terms of scientific enquiry
most pupils will: make measurements of temperature and mass adequate for the investigation they are carrying out; describe some of the stages in development of a new product
some pupils will not have made so much progress and will: make measurements of temperature and mass; identify some products that have recently been developed
some pupils will have progressed further and will: explain the stages of development of a new product
in terms of materials and their properties
most pupils will: describe how chemical reactions are used to make new products and as a source of energy; use the particle model to explain how mass is conserved during chemical reactions and other changes; represent chemical reactions by word equations
some pupils will not have made so much progress and will: name some products produced by chemical reactions and identify burning as a reaction which produces energy
some pupils will have progressed further and will:
reconcile observations in which mass appears to be lost with the principle of conservation of mass, and represent some reactions by symbol equations
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