Grade 4 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 4.
Lessons
Simple Circuits: Make It Light Up
Light a bulb with one wire, hunt for materials that let electricity through, find out why string lights all go dark at once, and build a burglar alarm. Four hands-on lessons on closed loops, safe and cheap.
Earth and Sky at Home
Make a rainbow on the kitchen floor, grow crystals on a windowsill and build a cloud in a jar. Three classic home experiments that actually work, with the real science explained for grown-ups.
Bouncing Light: Mirrors, Water and Colour
Steer a beam around a wall with mirrors, find out why a pencil looks broken in water, and split white light into the colours hiding inside it. Three hands-on lessons on reflection, refraction and colour that build on shadows and work in any climate.
Printable worksheets
Online practice
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.
Sun and Shadow
Move through the day and the year to see where the Sun is in the sky, how long a stick's shadow is, and how many hours of daylight any latitude gets.
Light and sound in other grades:KindergartenGrade 1Grade 2Grade 3Grade 5Grade 6Grade 7Grade 8All grades