Controlled Experiments

What is the primary purpose of having only one independent variable in a controlled experiment?

• To ensure the results are due to that variable alone

• To simplify the experiment

• To reduce the number of variables to measure

• To make the experiment more interesting

In the plant growth experiment, what is the independent variable?

• Amount of fertilizer

• Amount of sunlight

• Amount of water

• Type of plant

Why is a control group important in a controlled experiment?

• To make the experiment more complex

• To increase the number of variables

• To ensure all variables are changed

• To verify the effect of the independent variable

What could make an experiment difficult to interpret?

• Measuring the dependent variable

• Having multiple independent variables

• Using a control group

• Having a single independent variable

What is the benefit of a well-designed experiment?

• It makes it easier to draw valid conclusions

• It allows for multiple hypotheses to be tested simultaneously

• It eliminates the need for a control group

• It requires fewer resources