4. Seawater is a____? A. heterogeneous mixture C. substance B. homogeneous mixture D. compound 5. Which of the following is an example of a heterogeneous mixture? A. salt water B. brass C. salad D. tomato soup 6. Which of these common substances is a homogeneous mixture? A. table salt B. pure water C. sugar solution D. maple syrup 7. Which of the following an example of a solution? A. blood B. cooked flour C. marshmallow D. seawater is 1