Introduction to Mixtures - Part 1 and Part 2

*The PART 1 questions should be completed and submitted to Mr. Mak BEFORE March break.
*PART 2 questions should be done and submitted by the end of our first week back after March Break
*All students are welcome to sign out a copy of the Mixtures mini-textbook overnight, if needed.

Grade 7 - Introduction to Mixtures Assignment - Part 1

*Use the mini-textbook on Mixtures to answer each question in your Science journal. Page hints are given in brackets. Work will be checked and marked.

1. LIST the first four big ideas of this unit. (page 1)
2. Define volume. Include the most common units. (p. 5)
3. What are two ways the amount of matter is usually measured? (p. 5)
4. A long plastic cylinder, known as a _____________ in often used to measure volume. (p. 5)
5. When water is placed in a graduated cylinder to measure volume, it pulls up the sides of the cylinder to make a curve. When measuring volume we use the lowest part of this curve, which is known as the ___________. (p. 6)
6. Make a quick labelled sketch of the warning symbols for corrosive, poison, flammable and explosive. Briefly define each of these hazards in your own words. (p. 8)
7. What are the most common units for measuring mass? (p. 9)
8. Name the scientific instrument that is often used for measuring mass in a classroom. (p. 10)
9. All matter fits into one of two groups. The first group, is known as _____________.  The second group is known as a _____________. (p.13)
10. Explain, in your own words, the difference between a pure substance and a mixture.
11. Give two real-world examples of a pure substance and a mixture. (p. 13/14/15)
12. Mixtures can be subdivided into two more groups. These are: _______________ and ___________. (p. 14 - bottom)
13. Define, in your own words, what a mechanical mixture is. (p. 15)
14. Another name for a mechanical mixture is a _______________ mixture. (p. 15)
15. Define, in your own words, what a solution is. (p. 15)
16. Another name for a solution is a __________________ mixture. (p. 15)
17. Give two real-world examples of mechanical mixtures (heterogeneous mixtures) . (p. 16)
18. Give two real-world examples of solutions (homogeneous mixtures). (p. 16/18)
19. Complete questions 2,3 on page 17.
20. List three mixtures (mechanical or solutions) you have encountered in the last 24 hours. Classify each one as mechanical or solution. Have you encountered any pure substances?

    
    

    
    

    
    

    Matter Review Video:

    https://www.youtube.com/watch?v=ELchwUIlWa8

    
    

    

    
    

    

    
    

    

    
    

    

    

    
    

    

    
    

    
    

    
    
    

    Grade 7 - Introduction to Mixtures Assignment - Part 2

    
    

    *If needed, use the images above to help with some of the questions

    
    

    
    

    1. List four key ideas of the particle theory of matter. (p. 34)
    2. Read the explore section on page 18. Explain what a solution is. (p. 18)
    3. Explain how a solution is different than a mechanical mixture. (p. 18)
    4. WITHOUT reading the information, predict whether each mixture listed at the bottom of page 18 is a mechanical mixture or solution. Next, read the text to see if your predictions are correct. (p. 18)
    5. Briefly explain how a centrifuge can be used to separate parts of a solution. (p. 28)
    6. Distillation is a method of separation that can separate a ____________ from a __________ OR a _____________ from another ____________. (p.30)
    7. Use the information and diagram on page 31 to explain how fractional distillation of crude oil works. (p. 31)
    8. List four important “fractions” that crude oil is separated into. (illustration p. 31)
    9. Use the glossary on p. 106-107 to define the work soluble and solubility. (p. 106-107)
    10. List two things that are SOLUBLE in water.
    11. Use the same glossary to help you explain the difference between a solvent and solute. (p. 107)
    12. If you are mixing “kool-aid” powder into water, which is the solute and which is the solvent? Briefly explain how you know. (p. 38)
    13. Explain, in your own words what dissolving means. (p. 37)
    14. What are three things you can do to speed up the rate at which any solute dissolves into a solvent? (p. 40 - illustration and text)
    15. Briefly explain how each of the methods from question #16 (stirring, increased temperature and increased surface area/smaller particles) leads to faster dissolving. (p. 40)
    16. Complete page 41 #2
    17. A concentrated solution has a lot of _________ dissolved into the _________. (p. 42)
    18. Define, in your own words, what a dilute solution is. (p. 42)
    19. Define what the word concentration means, when referring to a solution. (p. 42)
    20. If 75g of sugar are dissolved into 100ml of water, what is the concentration of the solution? (p. 42)
    21. Complete page 43 #3a/b/c (*remember that concentration should be Xgrams/100mL)
    22. If you are making a fruit drink by adding juice crystals to water and all the crystals dissolve, what type of solution is this? Is it saturated or unsaturated? Explain how you know. (p. 44)
    23. When so much solute (juice crystals) is added that it no longer dissolves in a solution with water, this is an example of a ________________ solution. (p. 44)
    24. Complete page 45 #2.
    25. The maximum solute that can dissolve in a solvent at a specific temperature is known as __________________. (p. 45)
    26. What are three factors that can impact the solubility of a solution? (p. 45)
    27. Explain, in your own words, what a supersaturated solution is. (p. 48)
    28. ______ is a word that refers to when a solute cannot dissolve in a solvent. (p. 49/50)

        
        

        
        

        Fractional Distillation Video:
        https://www.youtube.com/watch?v=PYMWUz7TC3A