Types of Investigations

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What is an experimental investigation?

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An investigation where one or more variables are manipulated to observe the effect on another variable, often involving a control group.

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What is a control group?

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The group in an experiment that does not receive the experimental treatment and is used for comparison.

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What is a hypothesis?

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A testable statement predicting the relationship between variables, often formatted as 'If...then...'.

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What is a comparative investigation?

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An investigation that compares two or more groups or conditions to draw conclusions.

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What is a quantitative observation?

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An observation that involves measuring or counting, resulting in numerical data.

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What is a qualitative observation?

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An observation that describes qualities or characteristics, often using descriptive language.

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What is the purpose of a variable in an experiment?

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A variable is a factor that can change in an experiment, affecting the outcome.

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What is a dependent variable?

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The variable that is measured or observed in an experiment, affected by the independent variable.

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What is an independent variable?

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The variable that is changed or controlled in an experiment to test its effects on the dependent variable.

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What is the difference between observation and inference?

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Observation is gathering information using the senses, while inference is a conclusion drawn based on observations.