Science topic

Grade 7 light and sound

How light travels and makes shadows and colours, and how sound is made and heard. Here is what we have for Grade 7.

Lessons

The Reason for the Seasons: Tilt, Daylight and the Solstice

Is summer when Earth is closest to the Sun? Students test the idea with real 2026 orbit distances and city temperatures from both hemispheres, walk a human orbit, graph real solstice day lengths from the Arctic to Tierra del Fuego and work out why a high Sun heats more than a low one. Nothing to buy: just the printed sheets and the room.

Online practice

Probability that a marble is NOT a certain colour
Probability of one colour or another

Free tools

Sound Wave Lab

Play a tone, change its pitch and loudness, and watch the wave change shape. Includes a live microphone wave view to see your own voice.

Light and sound in other grades:Kindergarten Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 Grade 6 Grade 8 All grades