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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 472 · 40 questions
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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.

NameDateTime takenScore ___ / 40
  1. 1.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
  2. 2.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  3. 3.True or false: cooking oil dissolves in water. (a) True (b) False
  4. 4.🛟 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
  5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
  6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
  7. 7.True or false: dissolving salt is a change that can be undone. (a) False (b) True
  8. 8.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  9. 9.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
  10. 10.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) baking soda (d) glucose powder
  11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) yeast (d) a spoon
  12. 12.🔍 Which is the odd one out? (a) food colour (b) sugar (c) small pebbles (d) table salt
  13. 13.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a magnet (d) a spoon
  14. 14.🔍 Which is the odd one out? (a) sand (b) food colour (c) small pebbles (d) cooking oil
  15. 15.True or false: baking a cake is a change that can be undone. (a) False (b) True
  16. 16.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  17. 17.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  18. 18.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sugar (d) cooking oil
  19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of salt
  20. 20.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting ice (c) freezing water (d) melting butter
  21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
  22. 22.True or false: rusting iron is a change that can be undone. (a) False (b) True
  23. 23.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
  24. 24.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  25. 25.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
  26. 26.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
  27. 27.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) freezing water (d) cooking an egg
  28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a magnet (d) a spoon
  29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a piece of string (d) a spoon
  30. 30.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  31. 31.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  32. 32.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  33. 33.True or false: melting ice is a change that can be undone. (a) True (b) False
  34. 34.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) sugar (d) sand
  35. 35.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) baking soda (d) sawdust
  36. 36.True or false: salt is not needed for growing salt crystals. (a) False (b) True
  37. 37.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a magnet (d) a spoon
  38. 38.⚖️ 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
  39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) salt (d) a spoon
  40. 40.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve

Answer key

  1. True
  2. can be undone
  3. False
  4. a grown-up
  5. False
  6. False
  7. True
  8. True
  9. can be undone
  10. chalk powder
  11. yeast
  12. small pebbles
  13. a magnet
  14. food colour
  15. False
  16. not needed
  17. dissolves in water
  18. cooking oil
  19. the amount of salt
  20. baking a cake
  21. the amount of water
  22. False
  23. dissolves in water
  24. needed
  25. water evaporates
  26. safe from small children
  27. freezing water
  28. a magnet
  29. turmeric powder
  30. cannot be undone
  31. cannot be undone
  32. not needed
  33. True
  34. sand
  35. sawdust
  36. False
  37. a spoon
  38. True
  39. a mirror
  40. does not dissolve

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