How can you speed up the dissolution of salt in water. Your group stated: If the water temperature increases, the dissolving time of the four salts will decrease. Your statement can BEST be described as your group's A) hypothesis. B) law. C) theory. D) variable.

A) hypothesis.

Explanation:

The statement is the question is an example of an hypothesis. A researcher would need to run a scientific study to prove that the statement: "If the water temperature increases, the dissolving time of the four salts will decrease" is true.

This what a hypothesis is: a statement that needs to be proved by conducting a scientific study.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."