Oscillation that transfers energy
A wave transfers energy and information without net transfer of matter. Distinguish amplitude, wavelength, period, and frequency.
KS3 Year 7 / Physics / Curriculum
Waves, light and sound: structured theory, worked examples, answered practice, and a mastery checklist for KS3 Year 7.
Unit
The essential chapter ideas in a clear sequence before practice.
A wave transfers energy and information without net transfer of matter. Distinguish amplitude, wavelength, period, and frequency.
The relation v = fλ connects the medium and the oscillation. At a boundary, source frequency stays fixed while speed and wavelength may change.
Use the normal, angles, and wavefronts. Superposition adds displacements without permanently changing the component waves.
Physics
Follow the method step by step and check why every step is valid.
A wave has frequency 4 Hz and wavelength 2.5 m. Find its speed.
Physics
Link each topic to equations, units, data handling, and required practical thinking.
The structure follows the official textbook layout and is used to organise study.
The areas that usually create mistakes or need extra revision.
v = 10 m/s
Before calculating, explain the key idea from “Sound as vibration” and which conditions must be checked.
The answer should show not only which rule is used for “Sound as vibration”, but also why it is valid here.
Waves, light and sound
Try independently, use the hint if needed, then open the answer guide.
1. Explain the idea and give one correct foundation example for “Sound as vibration”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Sound as vibration” to a physical law or model, correct units, and an interpretation.
2. Solve an application and show every intermediate step for “Pitch and loudness”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Pitch and loudness” to a physical law or model, correct units, and an interpretation.
3. Compare a correct and an incorrect approach and justify the difference for “Light sources”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Light sources” to a physical law or model, correct units, and an interpretation.
4. Create a short exam-style question and check your answer for “Reflection”.
Write known quantities in SI units, draw a diagram where useful, and state the law before substitution.
A complete answer links “Reflection” to a physical law or model, correct units, and an interpretation.
Where to start: textbook, daily material, PDFs, videos, and worked examples.
Targeted practice before full tests so coverage is clear.
How to measure progress in this chapter and when it enters a cumulative mock.
What to do after finishing the chapter and how it connects to the next unit.
Note: for the official examinable syllabus of each school year, always confirm with the school, tutor, and current Ministry/IEP announcements.