### Temperature

Water freezes at 0°Celsius (32°Fahrenheit) and boils at 100°C (212°Fahrenheit). Is there a temperature at which Celsius and Fahrenheit readings are the same?

Can you work out which drink has the stronger flavour?

### Does This Sound about Right?

Examine these estimates. Do they sound about right?

# Place Your Orders

##### Stage: 3 Challenge Level:

Have a look at the sets of four quantities below. Can you rank them in order from smallest to largest?

To help you to decide on your rankings, you may need to find extra information or carry out some experiments.

Can you provide convincing evidence of your final rankings?

 Number of   Mars bars with the same total weight as your whole class Steps when walking at a leisurely pace for 1 hour Stitches in a handknitted jumper People at a cup final in a large stadium Distance You can hop in 5 seconds From the top of a 6 storey building to the ground The distance from the penalty spot to the goal on a football field A car can drive on $1$cm$^3$ of fuel Time That a pet rat lives For light to reach us from the nearest star other than the sun Between two football world cups For all of the red blood cells in your body to be replaced....10 times Speed   Of a racehorse running at maximum speed Of the fastest sprinter in the world Of the fastest cyclist in an Olympic cycle sprint race Of a bus going past the school Mass    Of a standard family car Of a million cubic centimetres of water Of a team of international male rugby players (15 players) Of enough potatoes to make chips to feed everyone in the school for a week. Area    Of the sheets of paper in a ream (500 sheets) of A4. Of the floor of the classroom Covered by 5 litres of paint Of fabric needed to make school uniforms for the whole class. Volume of water   In a half-filled bath Used in a 10 minute shower Used in 5 dishwasher cycles Used to flush the toilet 20 times

Perhaps you might like to make 4 ranked quantities of your own to challenge a friend.

For more advanced science, see Approximately Certain