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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 242 · 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) False (b) True
  2. 2.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
  3. 3.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  4. 4.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
  5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
  6. 6.🛟 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
  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 keep it the same (b) we change it (c) we measure it
  8. 8.True or false: chalk powder does not dissolve in water. (a) True (b) False
  9. 9.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) table salt (d) cooking oil
  10. 10.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  11. 11.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) chalk powder (d) baking soda
  12. 12.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) folding paper (c) browning lemon ink (d) baking a cake
  13. 13.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
  14. 14.True or false: baking soda does not dissolve in water. (a) True (b) False
  15. 15.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
  16. 16.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
  17. 17.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) sand (d) sugar
  18. 18.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sand (d) glucose powder
  19. 19.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
  20. 20.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  21. 21.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) cooking oil (d) baking soda
  22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
  23. 23.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
  24. 24.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) glucose powder (d) chalk powder
  25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a spoon (d) a mirror
  26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the same dish (b) days to see crystals (c) the amount of salt (d) the kind of salt
  27. 27.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  28. 28.True or false: melting butter is a change that can be undone. (a) True (b) False
  29. 29.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
  30. 30.⚖️ 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 amount of water (b) the amount of salt (c) sunny or shady place (d) days to see crystals
  31. 31.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
  32. 32.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
  33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) glucose powder (d) baking soda
  35. 35.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) glucose powder (d) sawdust
  36. 36.True or false: salt is needed for growing salt crystals. (a) False (b) True
  37. 37.True or false: table salt does not dissolve in water. (a) True (b) False
  38. 38.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
  39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) warm water
  40. 40.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed

Answer key

  1. False
  2. to make it very salty
  3. dissolves in water
  4. True
  5. we measure it
  6. a grown-up
  7. we keep it the same
  8. True
  9. cooking oil
  10. not needed
  11. chalk powder
  12. folding paper
  13. does not dissolve
  14. False
  15. safe from small children
  16. True
  17. sand
  18. glucose powder
  19. False
  20. can be undone
  21. baking soda
  22. True
  23. True
  24. glucose powder
  25. a mirror
  26. days to see crystals
  27. not needed
  28. True
  29. True
  30. sunny or shady place
  31. needed
  32. needed
  33. False
  34. small pebbles
  35. sawdust
  36. True
  37. False
  38. True
  39. a magnet
  40. not needed

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