Energy
Quantitative energy transfers, work, power and conservation at G3 Science depth.
Learning goals
- Recognise kinetic, potential, nuclear and internal energy stores
- Describe mechanical energy transfer by a force acting over a distance
- Describe electrical energy transfer by an electric current
- Describe energy transfer by heating due to a temperature difference
- Describe energy transfer by electromagnetic and mechanical waves
- Recall and apply Ek = ½mv² in new situations
- Recall and apply Ep = mgh near the Earth's surface in new situations
- State and apply the principle of conservation of energy
- Recall and apply work done = force × distance moved in the force direction
- Recall and apply power = energy transfer / time taken
G3 Science (Physics) · Topic 6
Begin with the complete topic lesson. Then try a short check, use the feedback to review one idea and come back later for another attempt.
Before you begin
Build the idea in order
- Energy stores and transfers
- Kinetic and gravitational energy
- Conservation
- Work and power
Lessons
Energy
Quantitative energy transfers, work, power and conservation at G3 Science depth.
Check your understanding
Energy topic check
Check the required topic capabilities and get focused practice for ideas that need another look.
What to remember
- Name energy stores and describe transfers mechanically, electrically, by heating or by waves.
- Use Ek = ½mv² and Ep = mgh with mass in kilograms and vertical height change in metres.
- Energy is conserved; energy transferred to the surroundings has not been destroyed.
- Work is force multiplied by distance moved in the force's direction.
- Power is energy transferred per unit time, measured in watts.
Topic and syllabus information
Energy is Topic 6 in K326 / K327 Physics component · 2027.
The lesson and questions stay at the depth required for this course.
Reviewed 9 Aug 2026
Course and syllabus information
- Course
- SEC G3 Combined Science Physics component
- Edition
- SEC G3 Combined Science Physics component 2027