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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 937 · 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.

NameDateTime takenScore ___ / 40
  1. 1.⚖️ 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 change it (b) we measure it (c) we keep it the same
  2. 2.True or false: food colour dissolves in water. (a) False (b) True
  3. 3.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  4. 4.🔍 Which is the odd one out? (a) table salt (b) sugar (c) cooking oil (d) glucose powder
  5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
  6. 6.True or false: freezing water is a change that can be undone. (a) False (b) True
  7. 7.True or false: sugar dissolves in water. (a) True (b) False
  8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a spoon (d) warm water
  10. 10.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
  11. 11.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
  12. 12.🧺 Which of these is needed for growing salt crystals? (a) salt (b) turmeric powder (c) yeast (d) a magnet
  13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
  14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) warm water (d) a battery cell
  15. 15.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
  16. 16.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
  17. 17.True or false: glucose powder dissolves in water. (a) False (b) True
  18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
  19. 19.⚖️ 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 salt (b) the kind of salt (c) sunny or shady place (d) days to see crystals
  20. 20.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
  21. 21.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
  22. 22.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  23. 23.True or false: salt is not needed for growing salt crystals. (a) True (b) False
  24. 24.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) dissolving salt (c) freezing water (d) melting butter
  25. 25.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
  26. 26.🧂 Which of these does not dissolve in water? (a) cooking oil (b) glucose powder (c) table salt (d) food colour
  27. 27.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  28. 28.True or false: rusting iron is a change that can be undone. (a) True (b) False
  29. 29.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
  30. 30.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a shallow dish (d) a balloon
  31. 31.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
  32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a spoon (c) warm water (d) salt
  33. 33.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
  34. 34.True or false: food colour does not dissolve in water. (a) False (b) True
  35. 35.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
  36. 36.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) fish make it (d) sand is ground up
  37. 37.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) table salt (d) sand
  38. 38.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
  39. 39.⚖️ 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
  40. 40.⚖️ 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

Answer key

  1. we change it
  2. True
  3. needed
  4. cooking oil
  5. bigger crystals
  6. True
  7. True
  8. needed
  9. a mirror
  10. does not dissolve
  11. True
  12. salt
  13. few or no crystals
  14. a battery cell
  15. can be undone
  16. needed
  17. True
  18. False
  19. sunny or shady place
  20. False
  21. safe from small children
  22. not needed
  23. False
  24. milk turning to curd
  25. saturated
  26. cooking oil
  27. cannot be undone
  28. False
  29. True
  30. a balloon
  31. a grown-up
  32. a balloon
  33. tiny cubes
  34. False
  35. False
  36. sea water evaporates
  37. sand
  38. does not dissolve
  39. we measure it
  40. True

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