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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 949 · 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.🔍 Which is the odd one out? (a) sand (b) sawdust (c) sugar (d) cooking oil
  2. 2.⚖️ 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
  3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
  4. 4.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
  5. 5.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) yeast (d) a spoon
  6. 6.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  7. 7.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
  8. 8.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  9. 9.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
  10. 10.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
  11. 11.🧂 Which of these dissolves in water? (a) glucose powder (b) cooking oil (c) sand (d) sawdust
  12. 12.True or false: folding paper is a change that cannot be undone. (a) False (b) True
  13. 13.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
  14. 14.True or false: table salt does not dissolve in water. (a) False (b) True
  15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) salt (d) a shallow dish
  16. 16.🧂 Which of these does not dissolve in water? (a) sawdust (b) sugar (c) food colour (d) table salt
  17. 17.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) yeast (d) a magnet
  18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
  19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
  20. 20.True or false: sand dissolves in water. (a) True (b) False
  21. 21.True or false: freezing water is a change that can be undone. (a) True (b) False
  22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
  23. 23.🔍 Which is the odd one out? (a) baking soda (b) sand (c) food colour (d) table salt
  24. 24.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
  25. 25.True or false: chalk powder does not dissolve in water. (a) False (b) True
  26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) salt (c) a spoon (d) a piece of string
  27. 27.True or false: dissolving salt is a change that can be undone. (a) True (b) False
  28. 28.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
  29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the amount of salt (c) days to see crystals
  30. 30.True or false: glucose powder does not dissolve in water. (a) False (b) True
  31. 31.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
  32. 32.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
  33. 33.🔍 Which is the odd one out? (a) sand (b) cooking oil (c) chalk powder (d) food colour
  34. 34.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  35. 35.🔮 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
  36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to change its colour (d) to make it very salty
  37. 37.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
  39. 39.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  40. 40.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty

Answer key

  1. sugar
  2. we keep it the same
  3. True
  4. not needed
  5. yeast
  6. can be undone
  7. needed
  8. not needed
  9. does not dissolve
  10. False
  11. glucose powder
  12. False
  13. False
  14. False
  15. a magnet
  16. sawdust
  17. a shallow dish
  18. a grown-up
  19. we keep it the same
  20. False
  21. True
  22. False
  23. sand
  24. needed
  25. True
  26. a balloon
  27. True
  28. True
  29. the amount of salt
  30. False
  31. True
  32. does not dissolve
  33. food colour
  34. cannot be undone
  35. few or no crystals
  36. to make it very salty
  37. True
  38. True
  39. needed
  40. saturated

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