Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 SAT Question No.11 Growing Tomatoes David wanted to find out which fertiliser would help his tomato plants grow the tallest. He took four small tomato plants of the same variety, each measuring 25 cm in height, and fed each with the same amount of four different fertilisers. Each day David watered the plants with 250 cm 3 of water. Six weeks later he measured the height of the plants again.

Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 SAT Question No.11 Here are his results: Growlots cmWondaFeed - 90 cm MegaTom cmTomaGrow cm a)Design a table for these figures. (1 mark) L4 

Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 SAT Question No.11 Fertiliser Height of tomato plant after two weeks (cm) Growlots110 MegaTom140 WondaFeed90 TomaGrow115

Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 SAT Question No.11 b) Which fertiliser appears to have caused the largest increase in height? (1 mark) L3 Fertiliser Height of tomato plant after two weeks (cm) Growlots110 MegaTom140 WondaFeed90 TomaGrow115  MegaTom

Sc1 Skills for Key Stage 3 © Pearson Education Limited 2004 SAT Question No.11 Repeat the investigation to be sure of the reliability of the conclusions drawn. c) What would David have to do to be sure that the fertiliser chosen for part (b) really does produce the most growth? (1 mark) L5  Fertiliser Height of tomato plant after two weeks (cm) Growlots110 MegaTom140 WondaFeed90 TomaGrow115