Science · Stage 2
Rough and Smooth
Zoom on smooth, drag on rough — meet the slowing rub called friction!
✦ Science📘 Stage 2 · S2⏱ ~9 min🧒 Ages 6–7★ Free to start
I can compare how a toy moves on rough and smooth surfaces.
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Kavi's Toy Car Race
Kavi rolls a toy car 🚗 along a shiny floor — it glides far and fast! Then Kavi rolls it over a fuzzy carpet 🧶 — it slows down and stops quickly. "Something is rubbing and holding it back," hoots Kavi. "That slowing rub is called friction — rough surfaces have lots, smooth ones have little. Let's test it!"
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What your child will learn
1Rough, smooth and frictionWhen two things rub, they slow each other down. Tap each word to learn it.
2Smooth floor vs rough carpetSame toy, two surfaces. Tap each card to see what happens.
3Which way will it move?Guess first, then check. Tap Next test → for more!
4Rough or smooth?Be the scientist! Tap the right box for each surface.
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A peek inside
A toy car glides far on a smooth tile floor 🧊. Why?
A smooth floor has very little friction, so almost nothing slows the car down.
Try this at home: Fill in the blank: The slowing rub between two surfaces is called ________.
Part of Science · Stage 2 · S2 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.