Observational studies focus on natural occurrences, while controlled experiments involve manipulating variables.
Observational Study:
- How does the daytime temperature affect the formation of dew at night?
- Can plants prepare food even in artificial light?
Controlled Experiment:
- How effective is a new toothpaste in reducing cavities?
- Which is a better absorber of heat, an object painted black or the same object painted white?
https://brainly.com/question/39296657