Science · Stage 5

Challenge: Olympiad Reasoning

A claim is only as strong as the evidence behind it — a champion checks that the pattern fits, that only one thing changed, and that no other cause is hiding, before concluding.

✦ Science📘 Stage 5 · S5⏱ ~12 min🧒 Ages 9–10★ Free to start

I can judge whether evidence really supports a claim, and check for other causes before I conclude.

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Kavi Returns to the Olympiad Lab

Kavi pins a new claim to the lab wall 📌: "Steeper ramps make cars roll farther." "Not so fast," says Kavi 🦉. "At the Olympiad we never trust a claim until the evidence earns it. Does the pattern fit? Was it a fair test — only one thing changed? Could another cause be hiding? Put on your lab coat 🥼 — let's judge the evidence like champions."

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What your child will learn

1When does evidence truly SUPPORT a claim?A champion checks three things before trusting any claim. Tap each one!

2Results: how tall did the bean plants grow?

3Does this evidence support the claim?Read the test carefully — was it fair, or did something else change? Tap your answer, then tap Next test.

4Fair evidence or a hidden cause?What is the difference? Tap each card.

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A peek inside

The same car was rolled down two ramps. Only the surface changed — smooth: 80 cm, rough: 30 cm. Claim: a smooth surface has less friction. Does the evidence support it?

Only one thing changed — the surface. The car rolled farther on the smooth ramp, which fits 'less friction'. Nothing else could explain it, so the evidence supports the claim.

Try this at home: When does evidence truly support a claim?

Ready to play and learn?

Start the free interactive lesson, or print the handout for screen-free play.

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Part of Science · Stage 5 · S5 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.