Independent and Dependent Variables Quiz

Which variable is manipulated or changed by the researcher in an experiment?

• control variable

• dependent variable

• random variable

• independent variable

In a study investigating the effect of temperature on plant growth, what is the independent variable?

• temperature

• soil pH

• light intensity

• plant species

In a study investigating the effect of exercise on heart rate, what is the dependent variable?

• blood pressure

• body temperature

• heart rate

• oxygen saturation

In an experiment, the number of hours studied is varied to determine its effect on test scores. What is the independent variable?

• number of hours studied

• experiment

• effect on test scores

• test scores

In a study examining the relationship between caffeine consumption and sleep quality, what is the dependent variable?

• dream content

• caffeine consumption

• sleep quality

• number of hours slept

In a research study, the type of music played is manipulated to observe its impact on mood. What is the independent variable?

• number of participants in the study

• type of music played

• volume of music played

• duration of music played

In a study investigating the effect of fertilizer on plant growth, what is the dependent variable?

• time of day the fertilizer was applied

• type of fertilizer used

• amount of fertilizer used

• plant growth

In an experiment, the dosage of a medication is varied to determine its effect on pain relief. What is the independent variable?

• experiment

• dosage of the medication

• effect on pain relief

• medication

In a study examining the relationship between study time and exam scores, what is the dependent variable?

• exam scores

• research methodology

• independent variable

• study time

In a research study, the amount of sugar consumed is manipulated to observe its impact on energy levels. What is the independent variable?

• number of hours slept

• time spent exercising

• type of food consumed

• amount of sugar consumed