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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 328 · 40 questions
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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 “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
  2. 2.True or false: baking soda dissolves in water. (a) False (b) True
  3. 3.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
  4. 4.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) table salt (d) sand
  5. 5.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
  6. 6.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) baking soda (d) small pebbles
  7. 7.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a piece of string (d) a mirror
  8. 8.True or false: sugar dissolves in water. (a) True (b) False
  9. 9.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
  10. 10.True or false: glucose powder does not dissolve in water. (a) True (b) False
  11. 11.⚖️ 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 kind of salt (b) the same dish (c) days to see crystals (d) the amount of salt
  12. 12.🔍 Which is the odd one out? (a) food colour (b) sand (c) table salt (d) baking soda
  13. 13.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
  14. 14.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
  15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
  16. 16.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) chalk powder (d) table salt
  17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
  18. 18.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
  19. 19.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  20. 20.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) cooking oil (d) baking soda
  21. 21.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a balloon (d) a piece of string
  22. 22.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) food colour (d) chalk powder
  23. 23.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
  24. 24.⚖️ 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 water
  25. 25.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
  26. 26.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
  27. 27.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
  28. 28.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) turmeric powder (d) salt
  29. 29.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  30. 30.True or false: yeast is needed for growing salt crystals. (a) False (b) True
  31. 31.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) baking a cake (d) melting butter
  32. 32.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
  33. 33.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
  34. 34.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a balloon (d) a shallow dish
  35. 35.True or false: melting butter is a change that can be undone. (a) False (b) True
  36. 36.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) salt (d) a spoon
  37. 37.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
  38. 38.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
  39. 39.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) small pebbles (d) food colour
  40. 40.⚖️ 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) True (b) False

Answer key

  1. we measure it
  2. True
  3. needed
  4. sand
  5. False
  6. baking soda
  7. a piece of string
  8. True
  9. dissolves in water
  10. False
  11. days to see crystals
  12. sand
  13. True
  14. safe from small children
  15. a grown-up
  16. table salt
  17. few or no crystals
  18. water evaporates
  19. cannot be undone
  20. cooking oil
  21. a balloon
  22. chalk powder
  23. cannot be undone
  24. the amount of water
  25. does not dissolve
  26. dissolves in water
  27. sea water evaporates
  28. salt
  29. True
  30. False
  31. melting butter
  32. cannot be undone
  33. tiny cubes
  34. a shallow dish
  35. True
  36. a magnet
  37. False
  38. saturated
  39. food colour
  40. False

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