Question

select a difference between an experiment and an investigation.

• experiments include observations, while investigations do not.
• experiments have variables, while investigations do not
• investigations are question - based, while experiments are not.
• investigations analyze data, while experiments do not.

Explanation:

To determine the difference, we analyze each option:

• Option 1: Both experiments and investigations involve observations (e.g., in an investigation, one might observe a phenomenon to gather data), so this is incorrect.
• Option 2: Experiments involve manipulating variables (independent, dependent, control) to test hypotheses. Investigations, which can be more observational or descriptive, do not typically involve variable manipulation (they may observe existing variables but not manipulate them as in experiments). This fits.
• Option 3: Both experiments (to answer "Does X affect Y?") and investigations (to answer "What is the pattern of X?") are question - based, so this is incorrect.
• Option 4: Both experiments (analyzing data from variable manipulation) and investigations (analyzing observational data) involve data analysis, so this is incorrect.

Answer:

The correct option is: Experiments have variables, while investigations do not