Energy Stores and Transfers

IGCSE Edexcel Physics
4.2-4.3 Energy Stores and Conservation
Key Concepts: Energy is stored in different ways and transferred by different pathways. Total energy is conserved.

Section A: Energy Stores

1. Name the energy store for each scenario: (a) a stretched spring, (b) a moving bike, (c) a hot drink. [3]
2. State the principle of conservation of energy. [2]

Section B: Transfers

3. For each scenario, give the main transfer pathway: (a) toaster heating bread, (b) wind turning a turbine. [4]
Total marks: 9

Mark Scheme

1. Elastic, kinetic, thermal [3]
2. Energy cannot be created or destroyed, only transferred or stored [2]
3. Electrical to thermal (heating); mechanical transfer from wind to turbine [4]