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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 964 · 40 questions
TalentJR

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

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  1. 1.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
  2. 2.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) cooking an egg (d) dissolving salt
  3. 3.True or false: chalk powder dissolves in water. (a) True (b) False
  4. 4.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
  5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the kind of salt (b) sunny or shady place (c) the amount of salt (d) days to see crystals
  6. 6.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) saturated (d) frozen
  8. 8.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
  9. 9.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) baking soda (d) cooking oil
  10. 10.True or false: table salt does not dissolve in water. (a) True (b) False
  11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
  12. 12.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  13. 13.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
  14. 14.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) yeast (c) a battery cell (d) a magnet
  15. 15.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
  16. 16.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
  17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
  18. 18.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  19. 19.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
  20. 20.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
  21. 21.True or false: melting butter is a change that can be undone. (a) False (b) True
  22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
  23. 23.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) cooking oil (d) table salt
  24. 24.True or false: melting ice is a change that cannot be undone. (a) True (b) False
  25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a magnet (d) a piece of string
  26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) salt (d) a shallow dish
  27. 27.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
  28. 28.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) baking soda (d) sugar
  29. 29.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) sawdust (d) food colour
  30. 30.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
  31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the same dish (c) days to see crystals (d) sunny or shady place
  32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
  33. 33.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  34. 34.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
  35. 35.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
  36. 36.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) small pebbles (d) chalk powder
  37. 37.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  38. 38.True or false: salt is not needed for growing salt crystals. (a) True (b) False
  39. 39.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) dissolving salt (c) melting butter (d) melting ice
  40. 40.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed

Answer key

  1. few or no crystals
  2. dissolving salt
  3. False
  4. not needed
  5. sunny or shady place
  6. needed
  7. saturated
  8. does not dissolve
  9. baking soda
  10. False
  11. False
  12. can be undone
  13. not needed
  14. warm water
  15. True
  16. does not dissolve
  17. we keep it the same
  18. True
  19. False
  20. cannot be undone
  21. True
  22. True
  23. table salt
  24. False
  25. a magnet
  26. yeast
  27. False
  28. cooking oil
  29. sawdust
  30. sugar crystals form
  31. days to see crystals
  32. we change it
  33. not needed
  34. cannot be undone
  35. True
  36. sugar
  37. dissolves in water
  38. False
  39. rusting iron
  40. not needed

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