OCR Gateway A GCSE Physics Topic 8 REVISION (Global challenges)

This is a detailed REVISION lesson that contains an engaging powerpoint (99 slides) and is fully-resourced with associated worksheets. The lesson uses a range of activities which include exam questions (with displayed answers), differentiated tasks and quiz competitions to engage students whilst they assess their knowledge of the content that is found within topic 8 (Global challenges) of the OCR GCSE Physics A specification.

The following specification points are covered in this lesson:

• Explain the factors which affect the distance required for road transport vehicles to come to rest in emergencies and the implications for safety
• Estimate how the distances required for road vehicles to stop in an emergency, varies over a range of typical speeds
• Estimate the forces involved in typical situations on a public road
• Describe the main energy sources available for use on Earth, compare the ways in which they are used and distinguish between renewable and non-renewable sources
• Explain patterns and trends in the use of energy resources
• Recall that step-up and step-down transformers are used to change the potential difference as power is transferred from power stations
• Link the potential differences and numbers of turns of a transformer to the power transfer involved; relate this to the advantages of power transmission at high voltages
• Recall that the domestic supply in the UK is a.c. at 50Hz and about 230 volts
• Recall the differences in function between the live, neutral and earth mains wires, and the potential differences between these wires
• Explain the red-shift of light as seen from galaxies which are receding (qualitative only). The change with distance of each galaxy’s speed is evidence of an expanding universe
• Explain how red shift and other evidence can be linked to the Big-Bang model
• Recall that our Sun was formed from dust and gas drawn together by gravity and explain how this caused fusion reactions, leading to equilibrium between gravitational collapse and expansion due to the energy released during fusion
• Recall the main features of our solar system, including the similarities and distinctions between the planets and their moons

Due to the size of this revision lesson, it is likely to be used over the course of a number of lessons and can also be used throughout the duration of the GCSE course, as an end of topic revision lesson or as lessons in the lead up to mocks or the actual GCSE exams