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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 56 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a shallow dish (d) a balloon
  2. 2.⚖️ 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
  3. 3.⚖️ 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
  4. 4.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
  5. 5.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
  6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) days to see crystals (c) sunny or shady place
  7. 7.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
  8. 8.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
  9. 9.True or false: freezing water is a change that can be undone. (a) False (b) True
  10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
  11. 11.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a mirror (d) a balloon
  12. 12.True or false: sugar dissolves in water. (a) False (b) True
  13. 13.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) glucose powder (d) food colour
  14. 14.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
  15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
  16. 16.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
  17. 17.True or false: melting butter is a change that cannot be undone. (a) False (b) True
  18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
  19. 19.True or false: sand does not dissolve in water. (a) False (b) True
  20. 20.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  21. 21.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) baking soda (d) sugar
  22. 22.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) sand (d) chalk powder
  23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
  24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
  25. 25.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) salt (c) yeast (d) turmeric powder
  26. 26.🔍 Which is the odd one out? (a) food colour (b) sand (c) glucose powder (d) baking soda
  27. 27.True or false: melting ice is a change that can be undone. (a) True (b) False
  28. 28.True or false: table salt dissolves in water. (a) True (b) False
  29. 29.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  30. 30.True or false: baking soda dissolves in water. (a) True (b) False
  31. 31.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) sawdust (d) chalk powder
  32. 32.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
  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.🛟 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
  35. 35.⚖️ 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
  36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
  37. 37.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  38. 38.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
  39. 39.True or false: rusting iron is a change that can be undone. (a) False (b) True
  40. 40.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a battery cell (d) warm water

Answer key

  1. a balloon
  2. False
  3. False
  4. True
  5. can be undone
  6. the amount of salt
  7. True
  8. water evaporates
  9. True
  10. True
  11. a piece of string
  12. True
  13. small pebbles
  14. does not dissolve
  15. the kind of salt
  16. cannot be undone
  17. False
  18. to make it very salty
  19. True
  20. needed
  21. sawdust
  22. food colour
  23. False
  24. we change it
  25. salt
  26. sand
  27. True
  28. True
  29. not needed
  30. True
  31. sugar
  32. saturated
  33. we measure it
  34. a grown-up
  35. True
  36. we keep it the same
  37. not needed
  38. dissolves in water
  39. False
  40. warm water

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