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Ch. 3 Chemistry Review

Ch. 3 Chemistry Review . Miss Dorsey’s 7 th Grade Science Class. Question 1. A pure substance made of two or more elements that are chemically combined. . Answer 1. Compound. Question 2. When iced tea mix is combined with water, this is the solvent. Answer 2. water. Question 3.

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Ch. 3 Chemistry Review

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  1. Ch. 3 Chemistry Review Miss Dorsey’s 7th Grade Science Class

  2. Question 1 A pure substance made of two or more elements that are chemically combined.

  3. Answer 1 Compound

  4. Question 2 When iced tea mix is combined with water, this is the solvent.

  5. Answer 2 water

  6. Question 3 Choose the correct example of a physical property. (density, flammability, reactivity)

  7. Answer 3 Density

  8. Question 4 How is a mixture different from a compound?

  9. Answer 4 Each substance in a mixture keeps its chemical properties, while each substance in a compound form together to create a new substance with new chemical properties.

  10. Question 5 A metal dissolved in a metal is known as _________________. Steel is an example.

  11. CO2 CO2 Answer 5 alloy

  12. Question 6 A salad would be referred to as a : (solution, mixture, or compound)

  13. Answer 6 Mixture

  14. Question 7 An object that has properties of both solutions and suspensions is know as a ……….

  15. Answer 7 Colloid

  16. Question 8 List two elements.

  17. Answer 8 118 possible answers…use your periodic table to ensure you are correct.

  18. Question 9 Give an example of a solute that can be dissolved into water.

  19. Answer 9 Iced tea mix, lemonade mix, salt, sugar, etc.

  20. Question 10 NaCl is classified as a ________________.

  21. Answer 10 Compound

  22. Question 11 What is formed when particles of two or more substances are distributed evenly among each other?

  23. Answer 11 Solution

  24. Question 12 What are three ways to dissolve a solute more quickly in a solvent?

  25. Answer 12 Mix it more, crush it, heat the solute.

  26. Question 13 This compound is used by plants during photosynthesis.

  27. CO2 CO2 Answer 13 CO2

  28. Question 14 List one element that is classified as a nonmetal.

  29. CO2 CO2 Answer 14 Use your periodic table to check your answer. (You will need this for the test!)

  30. Question 15 A smoothie is a great example of this type of mixture: _______________.

  31. CO2 CO2 Answer 15 suspension

  32. Question 16 Sand, Soil, and Dirt are all examples of ________________.

  33. CO2 CO2 Answer 16 A mixture of solids.

  34. Question 17 What is a pure substance?

  35. CO2 CO2 Answer 17 A single element or compound that has definite chemical or physical properties.

  36. Question 18 Give an example of a pure substance.

  37. CO2 CO2 Answer 18 Any compound or element would be a correct answer.

  38. Question 19 What ways can be used to separate a mixture?

  39. CO2 CO2 Answer 19 A magnet A centrifuge Distillation A Filter

  40. Question 20: Is the item shown below: Element Compound and Molecule Element and Molecule None of the above

  41. Answer 20: Element Explain Why.

  42. Question 21: Is the item shown below: Element Compound and Molecule Element and Molecule None of the above

  43. Answer 21: Element and Molecule Explain Why.

  44. Question 22: Is the item shown below: Element Compound and Molecule Element and Molecule None of the above

  45. Answer 22: Compound and Molecule Explain “Why.”

  46. Question 23: Element, Compound or Mixture ? Answer: Element

  47. Question 24: Element, Compound or Mixture ? Answer: Element

  48. Question 25: Element, Compound or Mixture ? Answer: Mixtureof different elements

  49. Question 26: Element, Compound or Mixture ? Answer: Mixtureof different elements

  50. Question 27: Element, Compound or Mixture ? Answer: Compound

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