Question

Explain the difference between an experiment and other types of scientific investigations. Help me

Answer 1

experimental investigation is designed in which variables are manipulated, controlled, and measured in an effort to gather evidence. (All known variables have been identified!) must know this! and Has independent/manipulated and dependent/response variables.
comparative has no controls, a type of question, and might use variables.
descriptive is when it is 'observed' and little is known. not an original hypothesis/research question.
hope this helps