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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 776 · 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.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
  2. 2.⚖️ 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) days to see crystals (b) sunny or shady place (c) the same dish (d) the kind of salt
  3. 3.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) baking soda (d) sand
  4. 4.True or false: sugar does not dissolve in water. (a) True (b) False
  5. 5.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) browning lemon ink (c) rusting iron (d) baking a cake
  6. 6.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) milk turning to curd (d) folding paper
  7. 7.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
  8. 8.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
  9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
  10. 10.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) warm water (c) turmeric powder (d) a mirror
  11. 11.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
  12. 12.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
  13. 13.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
  14. 14.True or false: yeast is needed for growing salt crystals. (a) False (b) True
  15. 15.⚖️ 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 change it (b) we measure it (c) we keep it the same
  16. 16.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
  17. 17.🧂 Which of these does not dissolve in water? (a) table salt (b) sawdust (c) sugar (d) baking soda
  18. 18.⚖️ 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 keep it the same (c) we measure it
  19. 19.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  20. 20.🧂 Which of these dissolves in water? (a) sand (b) sugar (c) sawdust (d) cooking oil
  21. 21.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sawdust (d) sugar
  22. 22.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) milk turning to curd (d) browning lemon ink
  23. 23.⚖️ 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
  24. 24.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
  25. 25.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) chalk powder (d) food colour
  26. 26.True or false: cooking oil dissolves in water. (a) True (b) False
  27. 27.True or false: sawdust does not dissolve in water. (a) True (b) False
  28. 28.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) glucose powder (d) cooking oil
  29. 29.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
  30. 30.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
  31. 31.True or false: baking soda dissolves in water. (a) False (b) True
  32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) a shallow dish (d) warm water
  33. 33.⚖️ 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 change it (c) we keep it the same
  34. 34.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) cooking oil (d) small pebbles
  35. 35.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  36. 36.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
  37. 37.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
  38. 38.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
  40. 40.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone

Answer key

  1. to make it very salty
  2. sunny or shady place
  3. sand
  4. False
  5. dissolving salt
  6. folding paper
  7. needed
  8. cannot be undone
  9. sugar crystals form
  10. warm water
  11. False
  12. False
  13. safe from small children
  14. False
  15. we keep it the same
  16. True
  17. sawdust
  18. we change it
  19. dissolves in water
  20. sugar
  21. sugar
  22. melting butter
  23. False
  24. True
  25. chalk powder
  26. False
  27. True
  28. cooking oil
  29. water evaporates
  30. True
  31. True
  32. a balloon
  33. we measure it
  34. food colour
  35. needed
  36. dissolves in water
  37. does not dissolve
  38. needed
  39. bigger crystals
  40. can be undone

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