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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?

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Mixing Lemonade

Can you work out which drink has the stronger flavour?

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Does This Sound about Right?

Examine these estimates. Do they sound about right?

Fill Me Up

Age 11 to 14 Challenge Level:

Why not try filling some containers with water, perhaps 15ml (a tablespoon) at a time, and measure the height of the water level at each stage?
Record the heights and plot graphs to show the shape.
Which parts of the graph are straight lines? Which parts are curved? Can you explain why?