Question

practice it!
select the question(s) that would help determine the type of investigation needed.
does the time of day affect your investigation?
are you comparing something?
do you need a controlled setting to perform the investigation?
what protective gear is needed to conduct this investigation?
can you control the variables in the problem?

Explanation:

To determine the type of investigation (experimental, comparative, observational, etc.), questions about comparison, controlled settings, and variable control are key. "Are you comparing something?" helps identify comparative investigations. "Do you need a controlled setting?" and "Can you control the variables?" relate to experimental design. "Does the time of day affect..." is more about a specific factor, and "What protective gear..." is about safety, not investigation type. So the relevant questions are the ones about comparison, controlled setting, and variable control.

Answer:

• Are you comparing something?
• Do you need a controlled setting to perform the investigation?
• Can you control the variables in the problem?