Eight jobs in the science lab. Pick the right instrument, take the reading properly — and find out why where you put your eye changes the number you see.
1Choose the right thermometer for the job.
2Slide the thermometer down until the bulb is fully covered.
3Wait for the red liquid to stop moving.
4Drag to move your eye level with the top of the liquid.
5Drag the red marker to the liquid and read the scale.
Paused
How to play
ToolDigital → body temperature. Infrared → surfaces you must not touch. Laboratory → liquids and gases.
DragSlide the thermometer down until the whole bulb is under the liquid. A bulb in the air measures the air!
WaitThe chip says Settling… while the red liquid is still moving. Read it now and you read the wrong number.
EyeDrag to slide your eye up and down. Put the dashed line exactly level with the top of the red liquid.
ReadDrag the red marker onto the liquid top, then press Read it. Within 1 °C earns a star.
Why eye level matters: the scale is on the front of the glass and the liquid is deeper inside. Look from above and the liquid seems higher than it is, so you read too high. Look from below and you read too low.
Reading complete
Spot on!
Lab closed
Careful scientist!
6 / 8
What you practised
Digital for body temperature, infrared for surfaces, laboratory thermometer for liquids and gases.
The bulb must be fully covered, or you are measuring the air instead.
Wait until the red liquid stops rising or falling before you read.
Put your eye level with the top of the liquid — from above you read too high, from below too low.