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Introduction
Introduction
You can't touch it, create it or destroy it but it does let us work out what is possible - Energy. Read on to find out how to use it.
In this unit, you will continue to develop their understanding of energy and energy transfer begun in Key Stage 3. This includes development of the energy stores and pathways model you have studied previously.
You will learn how to measure the work done by a force acting over a distance and how this concept can be used to analyse energy changes in gravitational stores, through lifting and falling, and elastic potential stores during stretching using the relevant mathematical relationships. The conservation of energy through changes in the gravitational, kinetic, and elastic stores will also be discussed.
We will consider the dissipation of energy during transfers such as those caused by friction or electrical heating, leading to the idea of efficiency during different energy changes and its calculation. The concept of efficiency will then be applied to the selection of electrical devices.
Finally, you will learn about the rate of energy transfer in different systems through the concept of power and how this power rating can be used to determine total energy change over time.
Specification links:
Task 1: Know
Task 1: Know
Task 1a: Use look, cover, write check and quizlet to learn the answers to the core questions a formulas (bottom half of the knowledge organiser) and the keywords for this topic
Learn
Learn
Task 2: Principles
Task 2: Principles
Task 2b: Make notes that:
Define energy, system and work.
Name the 7 different energy stores.
Name the 4 ways energy can be transferred.
Describe energy changes in a system.
Task 2c: Complete the exam question and mark your answers.
Task 3: Conservation of energy
Task 3: Conservation of energy
Task 3b: Make notes that:
Describe the law of conservation of energy.
Describe why energy may not be considered useful.
Describe and explain the energy stores and transfers in a pendulum.
Task 3c: Complete the exam question and mark your answers.
Task 4: Energy and work
Task 4: Energy and work
Task 4d: Complete the exam questions and mark your answers.
Task 5: Gravitational energy
Task 5: Gravitational energy
Task 5d: Complete the progress quiz
Task 6: Kinetic energy
Task 6: Kinetic energy
Task 7: Elastic energy
Task 7: Elastic energy
Task 8: Energy and efficiency
Task 8: Energy and efficiency
Task 8b: Make notes that:
Identify useful and wasted energy transfers in different appliances.
Calculate the efficiency of energy transfers.
Explain how to improve the efficiency of a system (H).
Answer the questions on slide 14.
Task 8c: Complete the exam questions and mark your answers.
Task 9: Energy and power
Task 9: Energy and power
Task 9b: Make notes that:
Define power.
Use the power equation.
Give the units for power.
Link equations for different energy stores and transfers.
Task 9c: Complete the worksheet.
Task 10: Summary
Task 10: Summary
Task 10a: Watch the videos:
Task 10b: Read through the BBC Bitesize revision pages and have a go at the quiz
Task 10c: Complete the seneca learning unit for your set.
Task 10d: Make a mind map or single page revision summary of this topic and add it to your revision folder. Use the specification and graphic organiser to help you.
Specification links:
Task 11: Check
Task 11: Check
Task 12: Extend
Task 12: Extend
Example exam questions
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