Science · Stage 2
Test and Record
Change just one thing, watch what happens, and write it down — that's a fair test!
✦ Science📘 Stage 2 · S2⏱ ~9 min🧒 Ages 6–7★ Free to start
A fair test changes only one thing at a time, and recording what happens — with a tally or a drawing — helps you remember and say what you found.
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Kavi's Two-Cup Plant Race
Kavi wants to know: do plants grow better in sunlight? 🌱☀️ "To be fair," hoots Kavi, "I give both cups the same soil and the same water — I only change one thing: one cup gets sun, one stays in the dark." Then Kavi makes a tally and a little drawing each day. "Recording helps me remember what I found!"
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What your child will learn
1What makes a test fair?A fair test changes only one thing and keeps everything else the same. Tap each rule.
2Predict: is this test fair?Read each plan, predict fair or not fair, then tap to check — and see why!
3Sort: change it or keep it same?In our plant test we are testing sunlight. Tap each thing: do we change it, or keep it same?
4Remember it or guess it?What happens if you write it down — or don't? Tap each card.
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A peek inside
Kavi tests if plants grow taller with sun. What is the one thing to change?
Keep the soil, water, cup and seed the same. Only change how much sunlight each plant gets.
Try this at home: To keep a test fair, how many things should you change at a time?
Part of Science · Stage 2 · S2 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.