7. Sand and pebbles are a mixture. a. homogeneous b. solution c. heterogeneousd. none of the choices 8. Which of the following materials are not dissolve in any solvent? a. paper b. flour c. Styrofoam d. plastic 9. Homogeneous means that every part of the material is a. different b. transparent c. the same d. liquid 10. If you can easily see the different parts that make up a mixture, you know that it is a mixture. a. homogeneous b. solution c. heterogeneous d. none of the choices 3 11. Which of the following does not affect the solubility of solid solutes? a. amount of solvent c. stirring b. temperature d. volume of solvent 12. The substance that is being dissolved and is usually present in smaller amount. a. solvent b. solution c. solute d. suspension 13. Water, vinegar and alcohol are substances that can dissolve solid. They are​