At the end of this unit
in terms of scientific enquiry
most pupils will: identify patterns in measurements of voltage and use these to draw conclusions about circuits; identify and control key factors in investigating simple cells and identify patterns in their results, including observations that do not fit the main trends
some pupils will not have made so much progress and will: measure the voltage of a range of cells; present data as charts or tables
some pupils will have progressed further and will:
relate energy transfer devices in the laboratory to everyday appliances; synthesise information from secondary sources about the development of the electricity supply industry and communicate it clearly; consider whether data is sufficient, and account for anomalies
in terms of physical processes
most pupils will: describe some energy transfers and transformations in familiar situations, including dissipated energy, and devices; recognise that the voltage change across a circuit component is a measure of its energy transfer; describe how voltage originates from a chemical cell; give examples of the hazards of high-voltage circuits; compare the energy consumption of common electrical appliances; describe how electricity is generated by energy from fuels, and recognise possible environmental effects of this
some pupils will not have made so much progress and will:
describe some useful energy transfer devices; recognise that any functioning circuit needs a power supply to provide a voltage and that high voltages are hazardous; recognise that electricity is a convenient way of 'delivering' energy, but that it must be paid for and that its generation can cause environmental problems; give examples of how energy goes to waste
some pupils will have progressed further and will:
apply a model of voltage and energy changes to a circuit; recognise that although the total energy in a system is conserved, energy can be dissipated; use 'power ratings' in comparing the costs of using different electrical appliances; link the function of an electric generator to magnetic effects
|
