A thermometer tells us how hot or cold something is.
In this Spark you will learn to:
Tap Next to begin, detective!
Tap each glowing ? to discover what it does.
👆 Tap a “?”
Each part has a special job. Find all three!
Found 0 of 3
The liquid rises as it gets warmer. Read the number where the red tops out.
What temperature is shown?
Numbers above 0 are positive — just say the number, like “twenty degrees”.
When it gets very cold, the liquid drops below 0. These numbers need a minus sign (–). We call them negative.
What does this cold thermometer read?
Below zero, count down from 0: −1, −2, −3…
Drag the red liquid up and down the tube. Make it show the target!
Target: 7°C
Your reading: —
Slide the liquid until your reading matches the target, then it locks in. ✅
Remember: on the scale, higher = warmer, lower = colder. And −5 is colder than −1 (it is further below zero).
Round 1 — Which is COLDER?
Round 2 — Which is WARMER?
Brilliant work — you can read any thermometer now! 🎉