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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 451 · 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.

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

Answer key

  1. True
  2. dissolves in water
  3. False
  4. sugar crystals form
  5. False
  6. True
  7. we change it
  8. can be undone
  9. False
  10. False
  11. few or no crystals
  12. to make it very salty
  13. cannot be undone
  14. a piece of string
  15. a battery cell
  16. False
  17. can be undone
  18. False
  19. True
  20. True
  21. False
  22. we keep it the same
  23. True
  24. turmeric powder
  25. False
  26. a mirror
  27. False
  28. True
  29. dissolves in water
  30. False
  31. turmeric powder
  32. False
  33. False
  34. folding paper
  35. we keep it the same
  36. cannot be undone
  37. table salt
  38. False
  39. not needed
  40. table salt

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