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Order the Changes
Can you order pictures of the development of a frog from frogspawn and of a bean seed growing into a plant?
Discuss and Choose
This activity challenges you to decide on the 'best' number to use in each statement. You may need to do some estimating, some calculating and some research.
Age 7 to 11
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 decide, you may need to find extra information or carry out some experiments.
Can you convince us that your order is right?
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Temperature
Of a kettle of boiling water
Of the centre of the sun
On a thermometer when you are quite well
Of the water in a school pond
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Speed
Of a rocket going up on bonfire night
Of a train
Of a ladybird walking along a leaf
Of a ball being thrown to your friend
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Time
Taken for a puddle of water to evaporate on a hot day
Taken for frogspawn to grow into a frog
Taken to walk across the playground
Taken for the moon to orbit the earth
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Sound
Of a clap of thunder
Of a teacher blowing a whistle
Of a tap running
Of a recorder being played by a friend
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.