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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 520 · 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 battery cell (b) a shallow dish (c) salt (d) warm water
  2. 2.🔍 Which is the odd one out? (a) table salt (b) sand (c) cooking oil (d) chalk powder
  3. 3.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
  4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a magnet (c) a piece of string (d) a shallow dish
  5. 5.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) melting ice (d) milk turning to curd
  6. 6.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a mirror (d) a shallow dish
  7. 7.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
  8. 8.⚖️ 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
  9. 9.True or false: food colour dissolves in water. (a) True (b) False
  10. 10.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
  11. 11.True or false: baking soda dissolves in water. (a) True (b) False
  12. 12.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  13. 13.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) glucose powder (d) sawdust
  14. 14.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sugar (d) sawdust
  15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) yeast (d) warm water
  16. 16.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) turmeric powder (d) warm water
  17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
  18. 18.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
  19. 19.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
  20. 20.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
  21. 21.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
  22. 22.True or false: folding paper is a change that cannot be undone. (a) True (b) False
  23. 23.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  24. 24.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) warm water (d) a battery cell
  25. 25.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  26. 26.⚖️ 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 same dish (b) sunny or shady place (c) days to see crystals (d) the kind of salt
  27. 27.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  28. 28.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
  29. 29.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) melting butter (d) browning lemon ink
  30. 30.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
  31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
  32. 32.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a shallow dish (d) a magnet
  33. 33.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
  34. 34.True or false: sawdust does not dissolve in water. (a) True (b) False
  35. 35.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
  36. 36.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  37. 37.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) sand (d) table salt
  38. 38.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
  39. 39.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  40. 40.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True

Answer key

  1. a battery cell
  2. table salt
  3. cannot be undone
  4. a magnet
  5. melting ice
  6. a mirror
  7. safe from small children
  8. True
  9. True
  10. dissolves in water
  11. True
  12. can be undone
  13. sawdust
  14. sugar
  15. yeast
  16. warm water
  17. False
  18. tiny cubes
  19. water evaporates
  20. True
  21. few or no crystals
  22. False
  23. needed
  24. a battery cell
  25. needed
  26. days to see crystals
  27. needed
  28. False
  29. melting butter
  30. saturated
  31. False
  32. a shallow dish
  33. bigger crystals
  34. True
  35. False
  36. not needed
  37. sand
  38. does not dissolve
  39. True
  40. True

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