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A student measures germination percentage at different temperatures. What are temperature and germination percentage respectively?

Answer and explanation

Correct answer: Independent and dependent variables

The independent variable is the factor that the investigator deliberately changes. The dependent variable is the response that is measured to see the effect of that change. In this experiment, the student uses different temperatures, so temperature is the factor being varied. The student then records the percentage of seeds that germinate, so germination percentage is the measured response.

Option A is correct because the order is independent variable followed by dependent variable: temperature and germination percentage. The question is asking for cause-like input and observed outcome, not for two controlled conditions. Other factors, such as seed type, amount of water and light, should normally be kept constant if the investigation is to compare temperature fairly. Thus, changing temperature and measuring germination clearly produce the pairing in A.

Related tags

TemperatureGerminationVariable-PairVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScienceClass 9 Mcq

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