D. variables True or False: Write T if the statement is correct and F if it is wrong. Write your on the blank provided before each number. a 16. Water has a chemical formula of H2O 17. Halo-halo is an example of an element. -18. Atom is the smallest particle of an element. 19. Air is an example of mixture. 20. The third step of scientific method is conclusion. 21. Gold is an example of mixture while salad is an element 22. Manipulate the data during the experiment. 23. Dependent variable is one that is manipulated 24. Hypothesis is an educated guess 25. Observing is the first step in Scientific Method​