Question

which statement best describes a difference or similarity between a comparative investigation and an experimental investigation?
comparative investigations may be impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations.
comparative investigations involve variables that can be controlled, while experimental investigations allow for the use of a wide range of variables but do not have a control group.
both experimental investigations and comparative investigations are designed to answer scientific questions
both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

Explanation:

• Comparative investigations compare different groups or conditions without controlling variables as strictly as experimental investigations. Experimental investigations have a control group and manipulate variables. But both are scientific methods aimed at answering scientific questions.
• The first option is incorrect as both types have their practical uses.
• The second option has incorrect statements about variable control and control groups.
• The fourth option is wrong as both can collect new data.

Answer:

Both experimental investigations and comparative investigations are designed to answer scientific questions.