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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 730 · 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 dissolves in water? (a) small pebbles (b) food colour (c) sand (d) cooking oil
  2. 2.🛟 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
  3. 3.True or false: rusting iron is a change that can be undone. (a) False (b) True
  4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) salt (d) a shallow dish
  5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
  6. 6.True or false: table salt does not dissolve in water. (a) False (b) True
  7. 7.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
  8. 8.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
  9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) yeast
  10. 10.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) salt (c) yeast (d) a balloon
  11. 11.True or false: cooking oil dissolves in water. (a) True (b) False
  12. 12.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  13. 13.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting butter (d) browning lemon ink
  14. 14.⚖️ 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 keep it the same (b) we measure it (c) we change it
  15. 15.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) freezing water (d) milk turning to curd
  16. 16.True or false: melting ice is a change that can be undone. (a) True (b) False
  17. 17.True or false: turmeric powder is not needed for growing salt crystals. (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: days to see crystals is what we measure. (a) False (b) True
  19. 19.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  20. 20.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
  21. 21.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a balloon (d) a spoon
  22. 22.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
  23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a magnet (d) a shallow dish
  24. 24.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  25. 25.True or false: dissolving salt is a change that can be undone. (a) True (b) False
  26. 26.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) baking soda (d) glucose powder
  27. 27.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
  28. 28.⚖️ 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 kind of salt
  29. 29.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
  30. 30.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
  31. 31.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
  33. 33.🔍 Which is the odd one out? (a) food colour (b) sand (c) small pebbles (d) sawdust
  34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) a piece of string (d) a shallow dish
  35. 35.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) sand (d) table salt
  36. 36.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
  37. 37.True or false: sawdust does not dissolve in water. (a) False (b) True
  38. 38.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
  39. 39.True or false: table salt dissolves in water. (a) False (b) True
  40. 40.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone

Answer key

  1. food colour
  2. safe from small children
  3. False
  4. turmeric powder
  5. bigger crystals
  6. False
  7. needed
  8. dissolves in water
  9. yeast
  10. salt
  11. False
  12. not needed
  13. melting butter
  14. we measure it
  15. freezing water
  16. True
  17. True
  18. True
  19. does not dissolve
  20. sugar crystals form
  21. a spoon
  22. True
  23. a magnet
  24. cannot be undone
  25. True
  26. sawdust
  27. False
  28. the kind of salt
  29. sea water evaporates
  30. False
  31. needed
  32. the amount of water
  33. food colour
  34. a battery cell
  35. table salt
  36. saturated
  37. True
  38. water evaporates
  39. True
  40. can be undone

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