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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 989 · 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 use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
  2. 2.🧂 Which of these does not dissolve in water? (a) glucose powder (b) small pebbles (c) baking soda (d) food colour
  3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
  4. 4.True or false: table salt dissolves in water. (a) True (b) False
  5. 5.True or false: freezing water is a change that cannot be undone. (a) False (b) True
  6. 6.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) salt (d) warm water
  7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
  8. 8.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  9. 9.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) cooking oil (d) sand
  10. 10.🧈 Which of these is a change that can be undone? (a) freezing water (b) browning lemon ink (c) rusting iron (d) cooking an egg
  11. 11.⚖️ 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 keep it the same (b) we change it (c) we measure it
  12. 12.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  13. 13.True or false: glucose powder does not dissolve in water. (a) True (b) False
  14. 14.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
  15. 15.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
  16. 16.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) food colour (d) sugar
  17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a mirror (d) a spoon
  18. 18.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
  19. 19.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
  20. 20.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a battery cell (c) warm water (d) a piece of string
  22. 22.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
  23. 23.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
  24. 24.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  25. 25.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
  26. 26.⚖️ 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) False (b) True
  27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
  28. 28.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
  29. 29.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
  30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
  31. 31.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
  32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
  33. 33.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) milk turning to curd (c) freezing water (d) dissolving salt
  34. 34.⚖️ 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) True (b) False
  35. 35.True or false: baking soda dissolves in water. (a) False (b) True
  36. 36.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
  37. 37.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a battery cell (c) turmeric powder (d) a mirror
  38. 38.True or false: sawdust does not dissolve in water. (a) True (b) False
  39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a balloon (d) salt
  40. 40.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True

Answer key

  1. sugar crystals form
  2. small pebbles
  3. a grown-up
  4. True
  5. False
  6. a magnet
  7. we measure it
  8. needed
  9. food colour
  10. freezing water
  11. we change it
  12. does not dissolve
  13. False
  14. saturated
  15. needed
  16. sawdust
  17. a mirror
  18. dissolves in water
  19. not needed
  20. dissolves in water
  21. a battery cell
  22. True
  23. True
  24. not needed
  25. False
  26. False
  27. few or no crystals
  28. True
  29. cannot be undone
  30. we keep it the same
  31. not needed
  32. bigger crystals
  33. milk turning to curd
  34. True
  35. True
  36. sea water evaporates
  37. a spoon
  38. True
  39. a balloon
  40. False

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