Ahypothesis is a lucky guess. true or false. . question 2.2. the conclusion of a study should always be that the hypothesis is correct. true. or false question 3.3. which variable is measured in an experiment? a. independent variable. b. dependent variable c. experimental variable. . question 4.4. most scientists come up with questions to investigate out of the blue. true. or false

The answer for the first is False, it is not based on luck but on previously conducted research or previous studies. The second one is also False. Even not proving a hypothesis can help science because then future researches know what is not true and can create new hypotheses based on that. The third one is C. experimental variable. That's when everything is the same except for that one which makes it an experiment. The last one is also false. The questions are usually based on previous research that was studied, read, or similar.

The air we breath is made of mostly oxygen molecules