At the end of this unit
in terms of scientific enquiry
most pupils will: make observations and measurements of mass and temperature; present results as line graphs and interpret these using scientific knowledge and understanding
some pupils will not have made so much progress and will: make observations and measurements of mass and temperature and, with help, present these as line graphs
some pupils will have progressed further and will: explain how scales they chose for graphs enabled them to present results effectively; make suggestions of additional work to test conclusions of their investigations
in terms of materials and their properties
most pupils will: distinguish between elements, compounds and mixtures in terms of the particles they contain; name and describe some common mixtures and use knowledge about separation techniques to suggest how they might be separated; identify melting and boiling points as the fixed temperatures at which elements and compounds change state, and use the particle model to explain changes of state
some pupils will not have made so much progress and will: name some common elements, compounds and mixtures and distinguish between representations or models of these; describe how some mixtures could be separated and recognise changes of state in elements and compounds
some pupils will have progressed further and will: explain their criteria for classifying materials as elements, compounds or mixtures; represent some compounds by formulae and explain what these show about the numbers and types of atom present; describe how mixtures do not change state at fixed temperatures
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