Formal:
* Scrutinized: This implies a thorough and critical examination.
* Inspected: This suggests a formal or official examination to check for quality or compliance.
* Examined: This is a general term for looking at something closely.
* Dissected: This implies a detailed analysis, breaking something down into its component parts.
Informal:
* Checked out: This is a more casual way of saying examined.
* Looked at: This is the most basic way to describe looking at something.
* Given a good look over: This suggests a thorough examination.
* Investigated: This suggests a more in-depth examination, often to find out the cause of something.
To choose the best word, consider the specific situation. For example, if you are talking about a scientific experiment, "scrutinized" might be the best choice. If you are talking about a casual observation, "checked out" might be more appropriate.