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Does Fertilizer Matter? Mrs. Lees experiment

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Observation: Some of my roses are growing taller than others

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What I know The rose bed beside the road had cow manure added to it last fall. The roses near the house were sprayed with Lowes Grow Crazy last month. The roses by the patio had Wal-Mart Nitrogrow sprinkled around them in May. The roses by the tree have been left alone all season.

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Hypothesis The type of fertilizer applied to roses will affect how tall they grow. The application of Grow Crazy from Lowes will cause my roses to grow tallest.

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Experiment Buy 4 identical rose bushes Plant the roses in identical pots Each rose will get 14 hours of sunlight a day Each rose will get 1 quart of water every other day

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Experiment Allow the plants to grow for 6 months, measuring the height of the roses on the 23 rd of each month.

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Data Collected FertilizerMar 23 Apr 23 May 23 June 23 July 23Aug 23 Sep 23 None2 m2.2 m2.4 m2.5 m2.8 m3.1 m3.4 m Grow Crazy 2 m2.1 m2.6 m3.0 m3.3 m3.5 m3.8 m Nitro- grow 2 m2.6 m2.8 m3.3 m3.6 m3.9 m4.2 m Cow Manure 2 m2.4 m2.6 m3.2 m3.9 m4.3 m4.6 m

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Graph of collected Data

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Conclusion Did the Grow Crazy from Lowes cause the roses to grow taller?

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Conclusion No, the Grow Crazy from Lowes did not cause my roses to grow tallest. The cow manure caused my plants to grow tallest.

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What do I do now?

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What is the variable? The fertilizer is the independent variable The growth of the roses is the dependent variable

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What is the Control Group? The control group is the rose bush that has no fertilizer because I made no changes to it.

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What are some constants? The amount of water The type of pot The amount of sun The time to grow The type of soil

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Think of a problem you have observed. Write a hypothesis that would solve the problem. Design an experiment that would test the hypothesis. Do not do the experiment! Identify the constant, the variable, and the control group for your experiment.

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