Negative numbers on a thermometer
The Maths Habit Handout to print
One is in a freezer, one is in a classroom and one is in the sun. Which is which?
- Temperature
- How hot or cold something is.
- Degrees Celsius (°C)
- The unit we measure temperature in.
- Negative number
- A number below zero.
- Rise and fall
- A rise goes up. A fall goes down.
- Mark it on the thermometer.A dot on the tube, at its number.
- Up is warmer, down is colder.Below zero the numbers go −1, −2, −3 as it gets colder.
- A rise jumps up. A fall jumps down.One jump for each degree. Count them.
What temperature does the thermometer show?
What temperature does the thermometer show?
Which is colder, 3 °C or −5 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −5 °C
Which is colder, −1 °C or −4 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −4 °C
Which is colder, 3 °C or −5 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −5 °C
Which is colder, −6 °C or −3 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −6 °C
Which is colder, 3 °C or −5 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −5 °C
Which is warmer, −2 °C or −5 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −2 °C
Which is colder, 3 °C or −5 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −5 °C
Which is the coldest, 4 °C, −1 °C or −3 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −3 °C
Which is colder, 3 °C or −5 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −5 °C
Which is colder, 0 °C or −1 °C?
Mark them on the thermometer.
Up is warmer, down is colder. −1 °C
Does the temperature go up or down?
Is it a rise or a fall? How many degrees?
The temperature is −2 °C.
It rises by 6 °C.
What is the new temperature?
Mark it on the thermometer.
Up is warmer, down is colder. 4 °C
The temperature is 3 °C.
It falls by 5 °C.
What is the new temperature?
Mark it on the thermometer.
Up is warmer, down is colder. −2 °C
The temperature is −2 °C.
It rises by 6 °C.
What is the new temperature?
Mark it on the thermometer.
Up is warmer, down is colder. 4 °C
The temperature is −1 °C.
It falls by 4 °C.
What is the new temperature?
Mark it on the thermometer.
Up is warmer, down is colder. −5 °C
Answer sheet
Thumbs up: warmer. Thumbs down: colder.
−3 °C, then 1 °C
Warmer2 °C, then −2 °C
Colder−6 °C, then −4 °C
Warmer−1 °C, then −5 °C
Colder0 °C, then −3 °C
Colder
The temperature rose by 7 °C to 3 °C. What was it at the start?
−4 °CWhich temperature is halfway between −5 °C and 3 °C?
−1 °CIt is −2 °C. It falls by 3 °C, then rises by 8 °C. What is the temperature now?
3 °C
Which is colder, −6 °C or −2 °C? Up is warmer, down is colder.
−6 °CPut these in order, coldest first: 1 °C, −4 °C, −2 °C.
−4 °C, −2 °C, 1 °CThe temperature is −3 °C. It rises by 7 °C. What is the new temperature? Mark it on the thermometer.
4 °C