Energy, in physics, the capacity for doing work. It may exist in potentialkineticthermal, electrical, chemicalnuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another. After it has been transferred, energy is always designated according to its nature. Hence, heat transferred may become thermal energy, while work done may manifest itself in the form of mechanical energy.

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## Lessons

### Lesson 1 – Energy stores and systems

This lesson offers an introduction to the energy topic and describes the different energy stores and types. It then goes on to explain how energy is transferred in a system and describes the changes involved in energy systems when an energy transfer takes place.

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### Lesson 2 – Energy changes

We now begin to look at performing calculations around gravitational potential energy and kinetic energy as well as explaining the relationship between the two equations. This allows us to then make predictions based on those types of energy in different contexts.

### Lesson 3 – Energy changes in systems & Specific heat capacity required practical

This lesson hinges around the Specific Heat Capacity AQA Required practical and explains how the specific heat capacity of a substance effects how quickly it will heat up or cool down. This allows us to then quantify this using the equation and to apply it to novel situations.

### Lesson 4 – Power

Power is defined as the rate at which energy is transferred or the rate at which work is done. In this lesson we will look at that in more detail and apply this using the power equation.

### Lesson 5 – Energy transfers in a system & Investigating thermal insulators required practical (Physics only)

This lesson looks at how energy is transferred in a closed system and links in ideas of how a reduction of unwanted energy transfers can be achieved. The latter parts focus on thermal conductivity and identifying factors that effect the rate of such conductivity. This also includes the physics only required practical ‘investigating thermal insulators’.

### Lesson 6 – Efficiency

The energy efficiency for any energy transferred can be calculated using an equation. This lesson applies the concept of efficiency to mathematical problems and solves them as decimals and percentages. For higher tier students it also looks at ways that efficiency of an intended energy transfer can be increased.

### Lesson 7 – National and global energy resources

The Earth has available energy resources that humans use. This lesson compares the different energy resources and considers environmental impacts and long term impacts of their uses.

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