Science Review        4 versus 5  Waste and Our World            v.  Classroom Chemistry
Grade 4:                 Unit Understandings1. Identify plant and animal wastes, and describe how they are recycledin natu...
5. Compare different kinds of packaging, and infer the relativeadvantages and disadvantages of that packaging. In evaluati...
9. Identify ways in which materials can be reused orrecycled, including examples of things that the studenthas done.10. De...
Grade 5: Unit Understandings1. Recognize and identify examples of the following kinds of mixtures:· two or more solids; e....
Grade 5: Unit Understandings5. Recognize that the surface of water has distinctive properties, anddescribe the interaction...
• You have 30 seconds from when I say go to  make a chart on the whiteboard that lists two  human wastes and two plant was...
• You have 30 seconds from when I say go to  make a chart on the whiteboard that lists two  human wastes and two plant was...
• Here you are given 3 mixtures. Name what  type of separation method would work best.  Explain why you chose that method....
• Moulds, fungi, bacteria and worms all help  natural wastes break down into soil. What do  we call these?
• Moulds, fungi, bacteria and worms all help  natural wastes break down into soil. What do  we call these?• Answer: Decomp...
• Please list 3 substances that will dissolve in  water and 3 substances that will not dissolve  in water.    Substances t...
Garbage Disposal• List a disadvantage (something that is bad)  about getting rid of garbage by the following  methods:• Bu...
Garbage Disposal• List a disadvantage (something that is bad) about  getting rid of garbage by the following methods:• Bur...
• Please give a descriptive explanation of how  you can make a salt crystal.
Please give a descriptive explanation of how youcan make a salt crystal.• Boil water• Add 3 cups of the boiling water to a...
• List 3 things you can put into a composter.  (only one can be fruit/vegetable related)
• List 3 things you can put into a composter.  (only one can be fruit/vegetable related)• Fruit and vegetable remains• Cof...
• Annie is growing crystals in class. She wants to  know if using sugar, instead of salt, will result  in a faster growing...
• Annie is growing crystals in class. She wants to  know if using sugar, instead of salt, will result in a  faster growing...
What does the word ‘biodegradable’ mean?Give one example of something that is notbiodegradable.
What does the word ‘biodegradable’ mean?Give one example of something that is notbiodegradable.Answer: Plastic*Technically...
• When we fill a jar with water, it forms a dome  like skin. What term do we use to describe  what causes this? Explain wh...
• When we fill a jar with water, it forms a  convex (dome-like) skin. What term do we use  to describe what causes this? E...
• For lunch your parents take you to Subway.  You order a sub. The vendor makes your  sandwich, wraps it in paper, puts a ...
• For lunch your parents take you to Subway. You order a  sub. The vendor makes your sandwich, wraps it in  paper, puts a ...
• Cold water is _____________ dense than hot  water• Ice cubes are ________________ dense than  cold water
• Cold water is more dense than hot water• Ice cubes are less dense than cold water• Water is its most dense around 4 degr...
• List 3 different waste disposal programs in  Lethbridge
• List 3 different waste disposal programs in  Lethbridge.•   Recycling Depot•   Grasscycling•   Backyard composting•   Ch...
• What is one way we can create carbon dioxide  by mixing a solid and a liquid?• How can we test to make sure that carbon ...
• What is one way we can create carbon dioxide by  mixing a solid and a liquid?• How can we test to make sure that carbon ...
What do the symbols stand for? Give anexample of each one.
What do the symbols stand for? Give anexample of each one.
• List 3 things that make carbon dioxide  different from oxygen
• List 3 things that make carbon dioxide  different from oxygen•   Tasteless•   Odourless•   Heavier than air•   Does not ...
• Give an example of how you can reuse the  following things:• Glass Jar• Empty Milk Carton
• When observing changes, what four signs can  we look for in order to identify whether or not  a chemical change has occu...
• When observing changes, what four signs can  we look for in order to identify whether or not  a chemical change has occu...
Remember this…
• You have one minute to discuss and decide on  at least two materials needed for a bike and  where those materials come f...
• If a change is reversible, we call it a  ________________ change. An example of  this is _________________________.• If ...
• If a change is reversible, we call it a physical  change. An example of this is dissolving salt in  water.• If a change ...
• List 3 ways that you can reduce waste. This  does not include recycling things.
• List 3 ways that you can reduce waste. This  does not include recycling things.•   Using a re-useable lunch kit•   Savin...
• If a solution is acidic, it will turn red litmus  paper _____________ and blue litmus paper  ______________.• If a solut...
• If a solution is acidic, it will turn red litmus  paper red (will not change) and blue litmus  paper red.• If a solution...
• Do all the members of your group vow to be  more green and look after the Earth for future  generations?• Explain why ag...
• When we look at a pH scale, it shows us how  acidic or basic a solution is.• Drain cleaner is listed as a 14. This means...
• When we look at a pH scale, it shows us how  acidic or basic a solution is.• Drain cleaner is listed as a 14. This means...
• List 3 main point about how a Water  Treatment Plant Works
• List 3 main point about how a Water Treatment  Plant Works                         Answer:•   Waste (not sludge) falls t...
Please explain the three types of matter usingthe words volume, shape, indefinite, definite
Please explain the three types of matter usingthe words volume, shape, indefinite, definite• Solids have definite shape an...
Give 2 reasons way saving and protecting cleanwater is so important (think back to the videoswe watched)
Give an example of something that is extremelyacidic. What number would it have on the pHscale?
Give an example of something that is extremelyacidic. What number would it have on the pHscale?Battery Acid (1)Stomach Aci...
• List 3 ways that you can save water
• List 3 ways that you can save water• Turning off the water while brushing your  teeth• Taking short showers instead of b...
What problem might we have if we were testingacidic and basic solutions, but only had bluelitmus paper?
What might we have a problem doing if we weretesting acids and bases, but only had blue litmuspaper?If it turns red, you k...
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Review (Waste in our World/ Classroom Chemistry)

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Review (Waste in our World/ Classroom Chemistry)

  1. 1. Science Review 4 versus 5 Waste and Our World v. Classroom Chemistry
  2. 2. Grade 4: Unit Understandings1. Identify plant and animal wastes, and describe how they are recycledin nature. For example, plant leaves serve as a source of food for soilinsects, worms and other creatures. The wastes of these animals maythen be further broken down by molds, fungi and bacteria.2. Identify and classify wastes that result from human activity.3. Describe alternative methods of disposal, and identify possibleadvantages and disadvantages of each.4. Distinguish between wastes that are readily biodegradable and thosethat are not.
  3. 3. 5. Compare different kinds of packaging, and infer the relativeadvantages and disadvantages of that packaging. In evaluatingdifferent forms of packaging, students should demonstrate the abilityto consider a consumer perspective as well as an environmentalperspective.6. Identify methods of waste disposal currently used within the localcommunity.7. Identify kinds of wastes that may be toxic to people and to theenvironment.8. Identify alternative materials and processes that may decrease theamount of waste produced; e.g., reducing wastage of food, usingboth sides of a sheet of paper.
  4. 4. 9. Identify ways in which materials can be reused orrecycled, including examples of things that the studenthas done.10. Develop a flow chart for a consumer product thatindicates the source materials, final product, its use andmethod of disposal.11. Identify actions that individuals and groups can taketo minimize the production of wastes, to recycle orreuse wastes and to ensure the safe handling anddisposal of wastes.
  5. 5. Grade 5: Unit Understandings1. Recognize and identify examples of the following kinds of mixtures:· two or more solids; e.g., sand and sugar· a solid and a liquid; e.g., sugar and water· two or more liquids; e.g., milk and tea.2. Apply and evaluate a variety of techniques for separating differentmaterials.3. Distinguish substances that will dissolve in a liquid from those thatwill not, and demonstrate a way of recovering a material fromsolution.4. Demonstrate a procedure for making a crystal.
  6. 6. Grade 5: Unit Understandings5. Recognize that the surface of water has distinctive properties, anddescribe the interaction of water with other liquids and solids.6. Produce carbon dioxide gas through the interaction of solids andliquids, and demonstrate that it is different from air.7. Distinguish reversible from irreversible changes of materials, andgive examples of each.8. Recognize and describe evidence of a chemical reaction. Explainhow the products of a reaction differ from the original substances.9. Use an indicator to identify a solution as being acidic or basic.
  7. 7. • You have 30 seconds from when I say go to make a chart on the whiteboard that lists two human wastes and two plant wastes. HUMAN WASTES PLANT WASTES * * * *
  8. 8. • You have 30 seconds from when I say go to make a chart on the whiteboard that lists two human wastes and two plant wastes. HUMAN WASTES PLANT WASTES * * * *• What is the main difference between these two wastes?
  9. 9. • Here you are given 3 mixtures. Name what type of separation method would work best. Explain why you chose that method. Mixture Sand and Iron Salt and Sand Flour, Sand and Pebbles Method
  10. 10. • Moulds, fungi, bacteria and worms all help natural wastes break down into soil. What do we call these?
  11. 11. • Moulds, fungi, bacteria and worms all help natural wastes break down into soil. What do we call these?• Answer: Decomposers
  12. 12. • Please list 3 substances that will dissolve in water and 3 substances that will not dissolve in water. Substances that dissolve Substances that do not dissolve 1. 1. 2. 2. 3. 3.
  13. 13. Garbage Disposal• List a disadvantage (something that is bad) about getting rid of garbage by the following methods:• Burning it• Dumping it
  14. 14. Garbage Disposal• List a disadvantage (something that is bad) about getting rid of garbage by the following methods:• Burning it• Dumping it• Answer: Burning garbage releases toxic chemicals into the air• Dumping garbage when the ground is not lined will allow dangerous liquids to absorb into the ground and water supplies
  15. 15. • Please give a descriptive explanation of how you can make a salt crystal.
  16. 16. Please give a descriptive explanation of how youcan make a salt crystal.• Boil water• Add 3 cups of the boiling water to a container• Add salt until the substance is saturated• Suspend a thread over the mouth of the jar so that the thread touches the water• Wait 1-3 weeks to observe growth – Do you know why boiling water is used rather than room temperature water?
  17. 17. • List 3 things you can put into a composter. (only one can be fruit/vegetable related)
  18. 18. • List 3 things you can put into a composter. (only one can be fruit/vegetable related)• Fruit and vegetable remains• Coffee grounds• Egg shells
  19. 19. • Annie is growing crystals in class. She wants to know if using sugar, instead of salt, will result in a faster growing crystal. What is her testable question?
  20. 20. • Annie is growing crystals in class. She wants to know if using sugar, instead of salt, will result in a faster growing crystal. What is her testable question?• How does using sugar, rather then salt, affect the rate of growth of a crystal?• Remember the formula “How does ‘manipulated variable’ effect ‘responding variable’.
  21. 21. What does the word ‘biodegradable’ mean?Give one example of something that is notbiodegradable.
  22. 22. What does the word ‘biodegradable’ mean?Give one example of something that is notbiodegradable.Answer: Plastic*Technically all things are biodegradable, butsome things can take hundreds of years to breakdown, such as plastic or aluminum.
  23. 23. • When we fill a jar with water, it forms a dome like skin. What term do we use to describe what causes this? Explain what this term means.
  24. 24. • When we fill a jar with water, it forms a convex (dome-like) skin. What term do we use to describe what causes this? Explain what this term means.• This is caused by surface tension. Surface tension is caused the water molecules are attracted to each other, which causes water beading and the convex skin.
  25. 25. • For lunch your parents take you to Subway. You order a sub. The vendor makes your sandwich, wraps it in paper, puts a napkin around it, and then places it in a plastic bag.• What is wrong with this scenario?
  26. 26. • For lunch your parents take you to Subway. You order a sub. The vendor makes your sandwich, wraps it in paper, puts a napkin around it, and then places it in a plastic bag.• What is wrong with this scenario?• What can you do to reduce waste in this situation?• What can you ask the business to do in order to reduce was in this situation?
  27. 27. • Cold water is _____________ dense than hot water• Ice cubes are ________________ dense than cold water
  28. 28. • Cold water is more dense than hot water• Ice cubes are less dense than cold water• Water is its most dense around 4 degrees, then it becomes less dense.
  29. 29. • List 3 different waste disposal programs in Lethbridge
  30. 30. • List 3 different waste disposal programs in Lethbridge.• Recycling Depot• Grasscycling• Backyard composting• Christmas Tree Collection• Leaf Fall Collection• Waste and Recycling center (includes hazardous wastes)
  31. 31. • What is one way we can create carbon dioxide by mixing a solid and a liquid?• How can we test to make sure that carbon dioxide is created?
  32. 32. • What is one way we can create carbon dioxide by mixing a solid and a liquid?• How can we test to make sure that carbon dioxide is created?• Answer: Baking Soda and Vinegar. We can test it by placing a candle in the bottom to observe whether the flame is extinguish. If this happens, we know that carbon dioxide is present.
  33. 33. What do the symbols stand for? Give anexample of each one.
  34. 34. What do the symbols stand for? Give anexample of each one.
  35. 35. • List 3 things that make carbon dioxide different from oxygen
  36. 36. • List 3 things that make carbon dioxide different from oxygen• Tasteless• Odourless• Heavier than air• Does not allow fire to burn
  37. 37. • Give an example of how you can reuse the following things:• Glass Jar• Empty Milk Carton
  38. 38. • When observing changes, what four signs can we look for in order to identify whether or not a chemical change has occurred?
  39. 39. • When observing changes, what four signs can we look for in order to identify whether or not a chemical change has occurred?• Colour Change• Bubbles• Precipitate• Heat is released
  40. 40. Remember this…
  41. 41. • You have one minute to discuss and decide on at least two materials needed for a bike and where those materials come from.
  42. 42. • If a change is reversible, we call it a ________________ change. An example of this is _________________________.• If a change is irreversible, we call it a ________________________ change. An example of this is ___________________________.
  43. 43. • If a change is reversible, we call it a physical change. An example of this is dissolving salt in water.• If a change is irreversible, we call it a chemical change. An example of this is frying an egg.
  44. 44. • List 3 ways that you can reduce waste. This does not include recycling things.
  45. 45. • List 3 ways that you can reduce waste. This does not include recycling things.• Using a re-useable lunch kit• Saving jars and plastic containers to re-use• Picking up litter• Using both sides of the paper
  46. 46. • If a solution is acidic, it will turn red litmus paper _____________ and blue litmus paper ______________.• If a solution is basic, it will turn red litmus paper _______________ and blue litmus paper _________________.
  47. 47. • If a solution is acidic, it will turn red litmus paper red (will not change) and blue litmus paper red.• If a solution is basic, it will turn red litmus paper blue and blue litmus paper blue (will not change).
  48. 48. • Do all the members of your group vow to be more green and look after the Earth for future generations?• Explain why agreeing to make this decision is important.
  49. 49. • When we look at a pH scale, it shows us how acidic or basic a solution is.• Drain cleaner is listed as a 14. This means it is very ___________________• Distilled water is listed as a 7. This means it is ______________________.
  50. 50. • When we look at a pH scale, it shows us how acidic or basic a solution is.• Drain cleaner is listed as a 14. This means it is very basic• Distilled water is listed as a 7. This means it is neutral.
  51. 51. • List 3 main point about how a Water Treatment Plant Works
  52. 52. • List 3 main point about how a Water Treatment Plant Works Answer:• Waste (not sludge) falls to the bottom of a tank and is taken to the dump• Bacteria eats the wastes• Clean water is released into the river• Sludge is ‘digested’ and spread over crops
  53. 53. Please explain the three types of matter usingthe words volume, shape, indefinite, definite
  54. 54. Please explain the three types of matter usingthe words volume, shape, indefinite, definite• Solids have definite shape and definite volume• Liquids have definite volume and indefinite shape• Gases have indefinite volume and indefinite shape
  55. 55. Give 2 reasons way saving and protecting cleanwater is so important (think back to the videoswe watched)
  56. 56. Give an example of something that is extremelyacidic. What number would it have on the pHscale?
  57. 57. Give an example of something that is extremelyacidic. What number would it have on the pHscale?Battery Acid (1)Stomach Acid (2)
  58. 58. • List 3 ways that you can save water
  59. 59. • List 3 ways that you can save water• Turning off the water while brushing your teeth• Taking short showers instead of baths or long showers• Not polluting rivers or storm water
  60. 60. What problem might we have if we were testingacidic and basic solutions, but only had bluelitmus paper?
  61. 61. What might we have a problem doing if we weretesting acids and bases, but only had blue litmuspaper?If it turns red, you know it is an acid. But if thepaper does not change colour, you cannot knowif it is a base or neutral.

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