Science · Stage 6

Investigate: The Water Cycle

Measure it more than once, average your readings, then conclude only what your data can prove — investigate the water cycle like a real scientist!

✦ Science📘 Stage 6 · S6⏱ ~12 min🧒 Ages 10–12★ Free to start

I can take repeated measurements, find the average, and draw a conclusion my data supports.

Start the free lesson →⬇ Printable PDF

📖

Kavi's Water-Cycle Lab

Kavi lines up three little dishes of water on the sunny windowsill 💧. "Where does the water keep going?" hoots Kavi. "I'll measure what is left — not just once, but every day and in every dish. Then I'll average my readings to smooth out any slip, and I'll conclude only what my numbers truly show. That is how a scientist watches the water cycle at work — water rising as vapour, gathering into clouds, falling as rain, over and over. Let's investigate!"

🎓

What your child will learn

1Water goes round and roundWater never leaves Earth — it just keeps moving in a loop. The sun heats water so it evaporates into vapour; up high it cools and condenses into cloud droplets; the droplets fall as precipitation (rain or snow); the water collects in rivers and seas — then it all begins again. Tap each stage!

2Measure · average · concludeA single reading can be wrong — a wobble, a splash, a misread line. Here is how a real scientist turns messy numbers into a trustworthy answer. Tap each step!

3The average sits in the fair middleKavi measured the water lost on three different days: 4 mL, 6 mL and 8 mL. To find the average, add them up — 4 + 6 + 8 = 18 — then divide by the 3 readings: 18 ÷ 3 = 6 mL. See how the average bar sits right in the middle of the readings?

4Measure, average, concludeDecide like a scientist. Predict each one, then tap Next test → for more!

🔍

A peek inside

I pour water into a dish and want a trustworthy number for how much it loses each day. What should I do before I trust a single day's reading?

One reading can be off — maybe I misread the line, or a drop splashed out. A scientist never trusts just one reading. So I take the measurement on several days (I repeat the trial), and later I can average them to smooth out any slip.

Try this at home: Why does a careful scientist measure the same thing more than once?

Ready to play and learn?

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

Start the free lesson →⬇ Download PDF

Part of Science · Stage 6 · S6 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.