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Chapter 2: Problem 45

You have decided to test the effects of five garden fertilizers by applying some of each to five separate rows of radishes. What is the variable you are testing? What factors should you control? How will you measure the results?

Short Answer

Expert verified
The variable being tested is the type of garden fertilizer. Control factors should include type of plant, amount of sunlight and water, temperature, soil type, amount of fertilizer, and length of the experiment. Results can be measured by comparing the growth of radishes in terms of their height, number of leaves, size or weight, or time taken to reach a certain growth stage.

Step by step solution

01

Identifying the Variable

The variable being tested in this experiment is the type of garden fertilizer used on each row of radishes. This is the factor that differs across the five garden rows and, therefore, can be considered as the independent variable.
02

Identifying the Control Factors

The control factors in this experiment are all the other conditions that need to be kept constant to ensure that it's only the variable (i.e., the type of fertilizer) that has an impact on the radishes' growth. These include the type of the plant (radishes), the amount of sunlight and water each row receives, the temperature and soil type, the amount of fertilizer used, and the time period for which the experiment is conducted.
03

Measuring the Results

The results can be measured by examining the effect of the fertilizers on the growth of the radishes. This could be quantified by measuring certain parameters such as the height of the plants, the number of leaves, the size or weight of the radishes, or the time taken for the radishes to reach a certain growth stage. The measurements need to be recorded and compared across the five rows to determine the efficacy of each type of fertilizer.

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