Adding sodium to chlorine gas will produce table salt. the formation of a new substance shows that change occurred. a. a physical b. a chemical c. both a physical and chemical d. neither a physical nor a chemical

In science class maria observed a white color and cut flowers she sees that the petals turn red when the flowers sitting in a vase that has red colored water she forms a hypothesis that the color reaches the flower through the stem what should we do to confirm the hypothesis