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Tomato plants in a garden are not growing well. The gardener hypothesizes that the soil is too acidic. To test this hypothesis, the gardener could
It tests the effect of a single independent variable.
change the pH of the soil
Mrs. Hausman
completing a data table of expected results
height of the plants
A hypothesis may lead to further investigation even if it is disproved by the experiment.
exercise
serves as a control for the experiment
Which statement best describes a controlled experiment?
It tests the effect of a single independent variable.
change the pH of the soil
Mrs. Hausman
completing a data table of expected results
height of the plants
A hypothesis may lead to further investigation even if it is disproved by the experiment.
exercise
serves as a control for the experiment
An experiment was carried out to answer the question Does the pH of water affect the growth of radish plants? What was the dependent variable in this experiment?
It tests the effect of a single independent variable.
change the pH of the soil
Mrs. Hausman
completing a data table of expected results
height of the plants
A hypothesis may lead to further investigation even if it is disproved by the experiment.
exercise
serves as a control for the experiment
A scientist is planning to carry out an experiment on the effect of heat on the function of a certain enzyme. Which would not be an appropriate step?
It tests the effect of a single independent variable.
change the pH of the soil
Mrs. Hausman
completing a data table of expected results
height of the plants
A hypothesis may lead to further investigation even if it is disproved by the experiment.
exercise
serves as a control for the experiment
Why do scientists consider any hypothesis valuable?
It tests the effect of a single independent variable.
change the pH of the soil
Mrs. Hausman
completing a data table of expected results
height of the plants
A hypothesis may lead to further investigation even if it is disproved by the experiment.
exercise
serves as a control for the experiment
An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin. In this investigation, the independent variable is the
It tests the effect of a single independent variable.
change the pH of the soil
Mrs. Hausman
completing a data table of expected results
height of the plants
A hypothesis may lead to further investigation even if it is disproved by the experiment.
exercise
serves as a control for the experiment
In an experiment to determine the effect of exercise on the pulse rate, a student checks his pulse rate before and after exercising. The purpose of checking his pulse before exercising is that it
It tests the effect of a single independent variable.
change the pH of the soil
Mrs. Hausman
completing a data table of expected results
height of the plants
A hypothesis may lead to further investigation even if it is disproved by the experiment.
exercise
serves as a control for the experiment
Who is the best teacher around?
It tests the effect of a single independent variable.
change the pH of the soil
Mrs. Hausman
completing a data table of expected results
height of the plants
A hypothesis may lead to further investigation even if it is disproved by the experiment.
exercise
serves as a control for the experiment
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