Final answer:
A good clue that an online quiz is based on science is if it asks for testable scientific questions and looks for cause-and-effect relationships. Referring to scientific data and using web-based resources can also indicate a science-based quiz.
Step-by-step explanation:
A good clue that an online quiz is based on science is if the quiz asks for scientific questions that are testable and look for cause-and-effect relationships. Additionally, if the quiz refers to scientific data from sources like the AP Biology Exam or suggests using web-based resources such as sample quizzes or online study guides, it is likely focused on science.