Living Earth Semester 1 Final Practice

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What is an independent variable?

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An independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

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What is a dependent variable?

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A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

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What are controlled variables?

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Controlled variables are factors that are kept constant throughout an experiment to ensure that the results are due to the independent variable.

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What is a control group?

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A control group is a group in an experiment that does not receive the treatment or intervention, used as a benchmark to measure how the other tested groups do.

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What structures are found in both plant and animal cells?

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Mitochondria and cell membrane.

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What is the role of producers in a food web?

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Producers are organisms that create energy through photosynthesis and contain the most energy in the ecosystem.

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What is the significance of a placebo in an experiment?

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A placebo is used as a control to compare the effects of the actual treatment, helping to determine the treatment's effectiveness.

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How does energy flow in a food web?

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Energy flows from producers to consumers and then to decomposers, with each level receiving less energy than the one before.

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data involves numerical measurements.

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What is the scientific method?

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The scientific method is a systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.