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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 231 · 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) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
  2. 2.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) table salt (d) chalk powder
  3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) a shallow dish (d) a piece of string
  4. 4.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
  5. 5.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
  6. 6.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) salt (c) a battery cell (d) turmeric powder
  7. 7.⚖️ 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
  8. 8.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) rusting iron (c) freezing water (d) melting butter
  9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) warm water (d) a piece of string
  10. 10.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  11. 11.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
  12. 12.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
  13. 13.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
  14. 14.🧂 Which of these does not dissolve in water? (a) sawdust (b) sugar (c) baking soda (d) food colour
  15. 15.🧂 Which of these dissolves in water? (a) sawdust (b) glucose powder (c) chalk powder (d) small pebbles
  16. 16.True or false: melting butter is a change that can be undone. (a) False (b) True
  17. 17.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) a balloon (d) yeast
  18. 18.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
  19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a piece of string (d) a mirror
  20. 20.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
  21. 21.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sand (d) sugar
  22. 22.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
  23. 23.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
  24. 24.True or false: cooking oil does not dissolve in water. (a) True (b) False
  25. 25.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
  26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) salt (d) a spoon
  27. 27.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) cooking an egg (c) melting butter (d) dissolving salt
  28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) yeast (d) a shallow dish
  29. 29.True or false: melting butter is a change that cannot be undone. (a) True (b) False
  30. 30.True or false: cooking oil dissolves in water. (a) True (b) False
  31. 31.🔍 Which is the odd one out? (a) sand (b) table salt (c) chalk powder (d) cooking oil
  32. 32.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
  33. 33.True or false: baking soda does not dissolve in water. (a) False (b) True
  34. 34.⚖️ 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) the kind of salt (b) the amount of salt (c) the same dish (d) sunny or shady place
  35. 35.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a shallow dish (d) yeast
  36. 36.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
  37. 37.True or false: sand dissolves in water. (a) False (b) True
  38. 38.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
  39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
  40. 40.🧂 Which of these does not dissolve in water? (a) food colour (b) chalk powder (c) glucose powder (d) baking soda

Answer key

  1. bigger crystals
  2. table salt
  3. a battery cell
  4. True
  5. False
  6. salt
  7. we keep it the same
  8. rusting iron
  9. a balloon
  10. not needed
  11. water evaporates
  12. can be undone
  13. safe from small children
  14. sawdust
  15. glucose powder
  16. True
  17. a spoon
  18. True
  19. a mirror
  20. cannot be undone
  21. sand
  22. sugar crystals form
  23. saturated
  24. True
  25. False
  26. a magnet
  27. cooking an egg
  28. yeast
  29. False
  30. False
  31. table salt
  32. not needed
  33. False
  34. sunny or shady place
  35. a shallow dish
  36. can be undone
  37. False
  38. False
  39. a grown-up
  40. chalk powder

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