Question

question 7 (1 point) is this a chemical or a physical change? water that is dyed blue is mixed with water that is dyed yellow. once mixed the color of the water is green.

Explanation:

When dyed blue - water and dyed yellow - water are mixed to get green - colored water, no new substances are formed. The change is only in the appearance or color due to the mixing of colored substances. In a physical change, the chemical composition of the substances involved does not change. In a chemical change, new substances are formed with different chemical properties. Since no new chemical substances are created here, it is a physical change.

Answer:

B. Physical change