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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 14 · 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: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
  2. 2.True or false: chalk powder does not dissolve in water. (a) True (b) False
  3. 3.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
  4. 4.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) yeast (d) a shallow dish
  5. 5.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
  6. 6.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a mirror (c) a battery cell (d) a magnet
  7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a piece of string (d) a mirror
  8. 8.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) sugar (d) sand
  9. 9.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
  10. 10.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
  11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a spoon (c) a piece of string (d) a shallow dish
  12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of salt (c) the amount of water (d) the kind of salt
  13. 13.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
  14. 14.True or false: dissolving salt is a change that can be undone. (a) False (b) True
  15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) a piece of string (d) warm water
  16. 16.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
  17. 17.⚖️ 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 measure it (b) we keep it the same (c) we change it
  18. 18.True or false: sugar does not dissolve in water. (a) True (b) False
  19. 19.True or false: sand does not dissolve in water. (a) False (b) True
  20. 20.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
  21. 21.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  22. 22.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) yeast (d) a battery cell
  23. 23.⚖️ 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 change it (b) we keep it the same (c) we measure it
  24. 24.True or false: melting butter is a change that cannot be undone. (a) True (b) False
  25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
  26. 26.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) melting butter (d) dissolving salt
  27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
  28. 28.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
  29. 29.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
  30. 30.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) baking soda (d) sand
  31. 31.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a mirror (d) a piece of string
  32. 32.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
  33. 33.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
  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 what we measure. (a) True (b) False
  35. 35.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) the dish melts (d) salt grows roots
  36. 36.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
  37. 37.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  38. 38.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
  39. 39.True or false: sand dissolves in water. (a) False (b) True
  40. 40.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) milk turning to curd (d) dissolving salt

Answer key

  1. bigger crystals
  2. True
  3. dissolves in water
  4. a shallow dish
  5. False
  6. warm water
  7. a mirror
  8. sugar
  9. False
  10. saturated
  11. a balloon
  12. days to see crystals
  13. cannot be undone
  14. True
  15. turmeric powder
  16. to make it very salty
  17. we measure it
  18. False
  19. True
  20. not needed
  21. needed
  22. salt
  23. we keep it the same
  24. False
  25. a grown-up
  26. cooking an egg
  27. we change it
  28. True
  29. True
  30. sand
  31. a piece of string
  32. safe from small children
  33. needed
  34. False
  35. water evaporates
  36. False
  37. needed
  38. not needed
  39. False
  40. dissolving salt

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