What this topic covers
Topic 3: Conservation of energy has 2 subtopics:
- Conservation, dissipation and efficiency
- Energy resources
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GCSE Edexcel Higher Combined Science Physics · Topic 3 of 13
Topic 3: Conservation of energy – GCSE Edexcel Higher Combined Science Physics revision notes
Choose a subtopic. Conservation, dissipation, efficiency and energy resources. 6 lessons in 2 subtopics.
Revise Topic 3: Conservation of energy for GCSE Edexcel Higher Combined Science Physics, including Conservation, dissipation and efficiency.
6
Lessons
2
Subtopics
Topic 3: Conservation of energy lessons by subtopic
6 lessons, grouped by subtopic.
Conservation, dissipation and efficiency
- Energy Transfer and Conservation
- Reducing Unwanted Energy Transfers
- Calculating Efficiency
- Increasing Efficiency
Energy resources
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Frequently asked questions
What is Topic 3: Conservation of energy?
Conservation, dissipation, efficiency and energy resources. 6 lessons in 2 subtopics.
What are fossil fuels?
Fossil fuels are energy sources formed from dead organisms buried and compressed over millions of years. The Energy Resources: An Overview notes cover this in full.
What is the law of conservation of energy?
The law of conservation of energy states that energy cannot be created or destroyed, only transferred from one store to another or transformed from one form to another. The Energy Transfer and Conservation notes cover this in full.
What is the difference between renewable and non-renewable energy?
Renewable energy sources are constantly replenished by natural processes, such as the Sun, wind, rivers and growing plants. The Energy Resources: An Overview notes cover this in full.
What is lubrication in physics?
Lubrication is the use of substances like oil or grease to reduce friction between moving surfaces, reducing unwanted energy transfers as heat. The Reducing Unwanted Energy Transfers notes cover this in full.
What is the efficiency equation?
Efficiency = useful output energy ÷ total input energy, or efficiency = useful power output ÷ total power input. The Calculating Efficiency notes cover this in full.
How do you calculate efficiency?
To calculate efficiency, divide the useful output by the total input. The Calculating Efficiency notes cover this in full.
What is a bio-fuel?
A bio-fuel is fuel made from recently living organisms like wood, crops or waste. The Energy Resources: An Overview notes cover this in full.
What is a closed system in physics?
A closed system is a system where no matter can enter or leave, allowing all energy transfers within the system boundaries to be tracked. The Energy Transfer and Conservation notes cover this in full.