Perplexors: Ages 14+

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Science experiment The clues

As his exhibit for the annual school science fair, Ferdy Fernley planted five tomato plants in a row. He labelled them one through five. Ferdy wanted to test the effectiveness of various fertilisers on tomato plant growth. He decided to use a different fertiliser for each plant and record the final plant height, the number of tomatoes each plant yielded, and the total weight of the yield to determine fertiliser effectiveness. The fertilisers used were bat guano, manure, dead carp, ground-up soup bones and compost. The final height for the plants were 10 centimetres, 20 centimetres, 40 centimetres, 50 centimetres and 70 centimetres. Each plant yielded 4, 6, 9, 12 and 21 tomatoes. Each plant produced a weight of 1 kilogram, 3 kilograms, 4 kilograms, 7 kilograms and 9 kilograms. Based on the clues, match each plant number with the fertiliser, the plant height, the number of tomatoes produced, and the total weight of each plant’s yield.

1. Plant Three was not fertilised with manure, and it produced a heavier yield than Plant Two but that was a lighter yield than the manure-fertilised plant. 2. Plant Four grew taller than Plant Three, but Plant Two grew taller than Plant Four. 3. Plants Three, Four and Five were not fertilised with either bat guano or soup bones. 4. The tallest and shortest plants did not produce either the most tomatoes or the heaviest yields. 5. The plant fertilised with the dead carp produced half as many tomatoes as Plant One, but it did produce the heaviest yield. 6. Bat guano fertilised the tallest plant but that plant produced the fewest tomatoes, and soup bones fertilised the plant that produced the lightest yield. 7. Plant One was taller than Plant Three by 10 centimetres, but it only grew half as tall as Plant Five. 8. Plant five did not produce the heaviest yield.

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The story

©Plant RTwo . I . C.PPlant ub l i cat i o ns Three Plant Four Plant Five •f orr evi ew pur posesonl y•

Plant One

bat guano manure dead carp soup bones compost

bat guano manure dead carp soup bones compost

bat guano manure dead carp soup bones compost

10 centimetres 20 centimetres 40 centimetres 50 centimetres 70 centimetres

10 centimetres 20 centimetres 40 centimetres 50 centimetres 70 centimetres

10 centimetres 20 centimetres 40 centimetres 50 centimetres 70 centimetres

10 centimetres 20 centimetres 40 centimetres 50 centimetres 70 centimetres

10 centimetres 20 centimetres 40 centimetres 50 centimetres 70 centimetres

4 tomatoes 6 tomatoes 9 tomatoes 12 tomatoes 21 tomatoes

4 tomatoes 6 tomatoes 9 tomatoes 12 tomatoes 21 tomatoes

4 tomatoes 6 tomatoes 9 tomatoes 12 tomatoes 21 tomatoes

4 tomatoes 6 tomatoes 9 tomatoes 12 tomatoes 21 tomatoes

4 tomatoes 6 tomatoes 9 tomatoes 12 tomatoes 21 tomatoes

1 kilogram 3 kilograms 4 kilograms 7 kilograms 9 kilograms

1 kilogram 3 kilograms 4 kilograms 7 kilograms 9 kilograms

1 kilogram 3 kilograms 4 kilograms 7 kilograms 9 kilograms

1 kilogram 3 kilograms 4 kilograms 7 kilograms 9 kilograms

1 kilogram 3 kilograms 4 kilograms 7 kilograms 9 kilograms

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Perplexors

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