Name Class Date. Read the words in the box. Read the sentences. Fill in each blank with the word or phrase that best completes the sentence.
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1 Skills Worksheet Directed Reading B Section: Mixtures PROPERTIES OF MIXTURES mixture compound physical identity 1. A combination of substances that are not chemically combined is called a(n). 2. Two or more materials that combine chemically form a(n). 3. In a mixture, the of the substances doesn t change. 4. Mixtures are separated through changes. Read the description. Then, draw a line from the dot next to each description to the matching word. 5. used to separate crude oil 6. used to separate a mixture of aluminum and iron 7. used to separate the parts of blood 8. used to separate sulfur and salt a. distillation b. centrifuge c. filter d. magnet Holt Science and Technology 16 Elements, Compounds and Mixtures
2 The Ratio of Components in a Mixture 9. Which of the following affects the color of granite? a. ratio of minerals b. amount of mixture c. temperatures of mixture d. weight of minerals SOLUTIONS 10. Which of the following is NOT true of solutions? a. They contain a solute. b. They contain evenly mixed substances. c. They contain a solvent. d. They look like two substances. 11. When a substance spreads evenly through a mixture, what is the process called? a. solute b. dissolving c. chemical change d. solubility 12. What do you call the substance that is dissolved in a solution? a. solute b. solvent c. compound d. mixture Holt Science and Technology 17 Elements, Compounds and Mixtures
3 13. In a solution, what do you call the substance in which something dissolves? a. solute b. solvent c. compound d. mixture solvent soluble particles small alloy 14. Salt is in water because it dissolves in water. 15. In a solution of two gases, the substance that is present in the largest amount is called the. 16. A solid solution of metals or nonmetals dissolved in metal is called a(n). 17. A solution contains many small. 18. The particles in solutions are so that they can t be filtered out. Holt Science and Technology 18 Elements, Compounds and Mixtures
4 CONCENTRATION OF SOLUTIONS 19. What is a measure of the amount of solute dissolved in a solvent? a. solution b. concentration c. mixture d. solvent Concentrated or Dilute? 20. How does a concentrated solution differ from a dilute solution? a. The concentrated solution has more solvent b. The concentrated solution has less solvent c. The concentrated solution has more solute d. The concentrated solution has less solute Solubility temperature solubility 21. The ability of a solute to dissolve in a solvent is called. 22. In a solution, the usually affects the solubility. Holt Science and Technology 19 Elements, Compounds and Mixtures
5 Use the graph below to answer questions 23 and 24. For each question, circle the letter of the best answer for each question. 23. Which solid is less soluble at higher temperatures than at lower temperatures? a. sodium chloride b. potassium bromide c. sodium nitrate d. cerium sulfate 24. Which solid s solubility is least affected by temperature changes? a. cerium sulfate b. sodium nitrate c. potassium bromide d. sodium chloride Holt Science and Technology 20 Elements, Compounds and Mixtures
6 Dissolving Gases in Liquids increases decreases 25. Solubility of gases in liquids often as temperatures rise. 26. Solubility of solids in liquids often as temperatures rise. Dissolving Solids Faster in Liquids 27. Which of the following methods will NOT make a solid dissolve faster? a. weighing c. heating b. crushing d. mixing SUSPENSIONS 28. Which of the following statements is NOT true about particles in a suspension? a. They are soluble. b. They settle out over time. c. They can block light. d. They scatter light. COLLOIDS 29. What do gelatin, milk, and stick deodorant have in common? a. They are colloids. b. Particles in each can settle out. c. They are compounds. d. They are solutions. Holt Science and Technology 21 Elements, Compounds and Mixtures
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