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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 97 · 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.True or false: food colour does not dissolve in water. (a) True (b) False
  2. 2.True or false: chalk powder dissolves in water. (a) False (b) True
  3. 3.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
  4. 4.⚖️ 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
  5. 5.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
  6. 6.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
  7. 7.True or false: cooking oil does not dissolve in water. (a) False (b) True
  8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) warm water (d) salt
  9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
  10. 10.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) salt (c) turmeric powder (d) a magnet
  11. 11.🧈 Which of these is a change that can be undone? (a) freezing water (b) browning lemon ink (c) cooking an egg (d) rusting iron
  12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
  13. 13.True or false: table salt dissolves in water. (a) False (b) True
  14. 14.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a balloon (d) a shallow dish
  15. 15.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  16. 16.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) food colour (d) cooking oil
  17. 17.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
  18. 18.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
  19. 19.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
  20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
  21. 21.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a balloon (c) a magnet (d) a battery cell
  22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
  23. 23.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) a spoon (d) a mirror
  24. 24.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
  25. 25.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
  26. 26.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
  27. 27.🔍 Which is the odd one out? (a) glucose powder (b) cooking oil (c) sand (d) small pebbles
  28. 28.True or false: small pebbles does not dissolve in water. (a) True (b) False
  29. 29.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  30. 30.True or false: melting butter is a change that cannot be undone. (a) False (b) True
  31. 31.True or false: food colour dissolves in water. (a) True (b) False
  32. 32.⚖️ 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 measure it (c) we change it
  33. 33.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  34. 34.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) fish make it (d) salt rains down
  35. 35.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
  36. 36.⚖️ 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) False (b) True
  37. 37.⚖️ 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
  38. 38.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
  39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
  40. 40.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water

Answer key

  1. False
  2. False
  3. does not dissolve
  4. we measure it
  5. cannot be undone
  6. safe from small children
  7. True
  8. a mirror
  9. sugar crystals form
  10. salt
  11. freezing water
  12. True
  13. True
  14. a shallow dish
  15. can be undone
  16. food colour
  17. water evaporates
  18. needed
  19. True
  20. True
  21. a piece of string
  22. bigger crystals
  23. a spoon
  24. can be undone
  25. False
  26. can be undone
  27. glucose powder
  28. True
  29. True
  30. False
  31. True
  32. we change it
  33. not needed
  34. sea water evaporates
  35. does not dissolve
  36. False
  37. False
  38. False
  39. a grown-up
  40. dissolves in water

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