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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 425 · 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.🧂 Which of these does not dissolve in water? (a) baking soda (b) cooking oil (c) sugar (d) food colour
  2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
  3. 3.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  4. 4.⚖️ 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) sunny or shady place (b) days to see crystals (c) the same dish (d) the amount of salt
  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 change it (b) we keep it the same (c) we measure it
  6. 6.⚖️ 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
  7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
  8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
  9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
  10. 10.True or false: table salt dissolves in water. (a) False (b) True
  11. 11.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
  12. 12.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) glucose powder (d) table salt
  13. 13.True or false: sawdust dissolves in water. (a) True (b) False
  14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the amount of water
  15. 15.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
  16. 16.⚖️ 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
  17. 17.True or false: food colour dissolves in water. (a) False (b) True
  18. 18.True or false: cooking oil does not dissolve in water. (a) True (b) False
  19. 19.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) food colour (d) cooking oil
  20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
  21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
  22. 22.True or false: cooking oil dissolves in water. (a) True (b) False
  23. 23.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
  24. 24.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
  25. 25.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) food colour (d) small pebbles
  26. 26.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
  27. 27.True or false: small pebbles dissolves in water. (a) True (b) False
  28. 28.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) melting ice (d) freezing water
  29. 29.True or false: baking soda does not dissolve in water. (a) False (b) True
  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: dissolving salt? (a) can be undone (b) cannot be undone
  32. 32.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
  33. 33.True or false: yeast is needed for growing salt crystals. (a) False (b) True
  34. 34.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  35. 35.⚖️ 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) False (b) True
  36. 36.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) the dish melts (d) salt grows roots
  37. 37.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
  38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
  39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
  40. 40.🧂 Which of these dissolves in water? (a) small pebbles (b) glucose powder (c) sand (d) chalk powder

Answer key

  1. cooking oil
  2. saturated
  3. not needed
  4. sunny or shady place
  5. we measure it
  6. False
  7. False
  8. tiny cubes
  9. not needed
  10. True
  11. True
  12. sawdust
  13. False
  14. days to see crystals
  15. does not dissolve
  16. True
  17. True
  18. True
  19. food colour
  20. we keep it the same
  21. a grown-up
  22. False
  23. False
  24. True
  25. small pebbles
  26. needed
  27. False
  28. milk turning to curd
  29. False
  30. cannot be undone
  31. can be undone
  32. cannot be undone
  33. False
  34. True
  35. True
  36. water evaporates
  37. False
  38. we keep it the same
  39. bigger crystals
  40. glucose powder

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