7th Unit #1 NOS Review

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What is a controlled experiment?

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A controlled experiment is a scientific test where all variables are kept constant except for one independent variable to determine its effect on a dependent variable.

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What is the independent variable in an experiment?

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The independent variable is the factor that is changed or manipulated in an experiment to observe its effect on the dependent variable.

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What is the dependent variable in an experiment?

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The 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 is an inference?

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An inference is a conclusion drawn from observations and prior knowledge, rather than direct evidence.

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What is the difference between observation and inference?

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Observation is the act of noting and recording something using the senses, while inference is the interpretation or conclusion based on those observations.

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What is a hypothesis?

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A hypothesis is a testable statement or prediction about the relationship between two or more variables.

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What is replication in scientific research?

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Replication is the process of repeating an experiment to verify the results and ensure reliability.

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What are models in science?

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Models are representations of objects, systems, or processes that help scientists understand and predict how things work.

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Why do models have limitations?

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Models have limitations because they cannot capture every detail of the real object or system they represent.

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What is soil erosion?

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Soil erosion is the process by which soil is removed from the Earth's surface by wind, water, or other natural forces.