Question

investigation procedures
investigation statement
1 to make a mixture, stir together the following five substances in a beaker: salt, pepper, glass beads, iron filings, and water.
2 tear the paper strip into five pieces of about the same size.
3 conduct five trials, measuring and comparing the total mass of the substances before and after the chemical reaction occurs.
4 in each of the two beakers, dissolve 10 grams (g) of sugar in 200 milliliters (ml) of water.
the following statements were taken from the procedures of four different investigations. the statement from which investigation is an example of repetition?
4
1
3
2

Explanation:

Repetition in an investigation involves conducting multiple trials of the same procedure. Investigation 3 mentions conducting five trials to measure and compare mass before and after a chemical - reaction, which is an example of repetition. The other investigations do not involve repeating the same procedure multiple times.

Answer:

C. 3