IP Combined Science Notes (Lower Sec, Year 1-2): 09) Waves, Light & Sound
In one line
Use wave speed equations, draw ray diagrams, and interpret sound investigations covering frequency and amplitude.
Last updated 30 Nov 2025
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- Start Here
- Learning targets
- 1 Wave terminology
- 2 Wave calculations
Q: What does IP Combined Science Notes (Lower Sec, Year 1-2): 09) Waves, Light & Sound cover?
A: Use wave speed equations, draw ray diagrams, and interpret sound investigations covering frequency and amplitude.
Wave behaviour explains ripples on water, colour from prisms, and the pitch of your voice. Work with both qualitative diagrams and quantitative calculations.
These notes align with MOE's Lower Secondary Science syllabus themes commonly taught in IP Sec 1–2, and act as a bridge into upper-secondary Physics, Chemistry, and Biology.
Status: MOE Lower Secondary Science syllabus (current release) checked 2025-11-30 - scope unchanged; remains the reference for these combined science notes.
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Start Here
| Read time | What to take away |
| 1 second | Waves transfer energy without transferring matter overall. |
| 10 seconds | Use wave speed, frequency, and wavelength together. For light, draw the normal first. For sound, link pitch to frequency and loudness to amplitude. |
| 100 seconds | Example: if wave speed stays constant and frequency doubles, wavelength halves because more wave crests pass each second. |
Learning targets
- Define transverse and longitudinal waves with particle motion diagrams.
- Apply
