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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 691 · 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 shallow dish (b) a spoon (c) a balloon (d) warm water
  2. 2.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
  3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
  4. 4.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
  5. 5.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) warm water (d) yeast
  6. 6.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
  7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a magnet (c) a spoon (d) salt
  8. 8.True or false: freezing water is a change that cannot be undone. (a) True (b) False
  9. 9.True or false: cooking an egg is a change that can be undone. (a) True (b) False
  10. 10.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) dissolving salt (d) cooking an egg
  11. 11.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
  12. 12.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a mirror (d) warm water
  13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
  14. 14.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) table salt (d) small pebbles
  15. 15.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
  16. 16.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
  17. 17.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) baking a cake (d) rusting iron
  18. 18.True or false: cooking oil does not dissolve in water. (a) False (b) True
  19. 19.True or false: freezing water is a change that can be undone. (a) False (b) True
  20. 20.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  21. 21.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
  22. 22.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) chalk powder (d) sand
  23. 23.⚖️ 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 amount of salt (b) days to see crystals (c) the kind of salt (d) sunny or shady place
  24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
  25. 25.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
  26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a balloon (c) a spoon (d) a shallow dish
  27. 27.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
  28. 28.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
  29. 29.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  30. 30.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
  31. 31.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
  32. 32.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) turmeric powder (d) warm water
  33. 33.⚖️ 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) sunny or shady place (c) the amount of salt
  34. 34.True or false: melting butter is a change that can be undone. (a) False (b) True
  35. 35.🔍 Which is the odd one out? (a) sugar (b) table salt (c) sawdust (d) baking soda
  36. 36.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
  37. 37.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) salt (c) a shallow dish (d) a spoon
  38. 38.⚖️ 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 change it (b) we measure it (c) we keep it the same
  39. 39.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) food colour (d) sawdust
  40. 40.True or false: baking soda dissolves in water. (a) True (b) False

Answer key

  1. a balloon
  2. to make it very salty
  3. sugar crystals form
  4. dissolves in water
  5. yeast
  6. False
  7. a magnet
  8. False
  9. False
  10. dissolving salt
  11. dissolves in water
  12. a mirror
  13. True
  14. table salt
  15. cannot be undone
  16. False
  17. freezing water
  18. True
  19. True
  20. can be undone
  21. few or no crystals
  22. sugar
  23. days to see crystals
  24. False
  25. False
  26. a balloon
  27. does not dissolve
  28. dissolves in water
  29. True
  30. False
  31. can be undone
  32. warm water
  33. the amount of salt
  34. True
  35. sawdust
  36. True
  37. turmeric powder
  38. we measure it
  39. food colour
  40. True

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