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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 991 · 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.

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  1. 1.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
  3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
  4. 4.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
  5. 5.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
  6. 6.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) cooking an egg (d) dissolving salt
  7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
  8. 8.True or false: baking soda does not dissolve in water. (a) True (b) False
  9. 9.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
  10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
  11. 11.True or false: chalk powder dissolves in water. (a) False (b) True
  12. 12.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  13. 13.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
  14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
  15. 15.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
  16. 16.True or false: glucose powder does not dissolve in water. (a) True (b) False
  17. 17.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
  18. 18.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  19. 19.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
  20. 20.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  21. 21.⚖️ 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) days to see crystals (b) sunny or shady place (c) the kind of salt (d) the same dish
  22. 22.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
  23. 23.🧂 Which of these dissolves in water? (a) sand (b) glucose powder (c) cooking oil (d) chalk powder
  24. 24.True or false: table salt dissolves in water. (a) False (b) True
  25. 25.True or false: sand does not dissolve in water. (a) False (b) True
  26. 26.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
  27. 27.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) a magnet (d) turmeric powder
  28. 28.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
  29. 29.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
  30. 30.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
  31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
  32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
  33. 33.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
  34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a piece of string (d) a magnet
  35. 35.True or false: glucose powder dissolves in water. (a) False (b) True
  36. 36.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  37. 37.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sand (d) sugar
  38. 38.⚖️ 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
  39. 39.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) table salt (d) food colour
  40. 40.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) food colour (d) baking soda

Answer key

  1. not needed
  2. few or no crystals
  3. we keep it the same
  4. needed
  5. can be undone
  6. cooking an egg
  7. False
  8. False
  9. water evaporates
  10. True
  11. False
  12. needed
  13. sea water evaporates
  14. sugar crystals form
  15. not needed
  16. False
  17. False
  18. not needed
  19. does not dissolve
  20. dissolves in water
  21. sunny or shady place
  22. not needed
  23. glucose powder
  24. True
  25. True
  26. a grown-up
  27. a shallow dish
  28. False
  29. True
  30. False
  31. False
  32. tiny cubes
  33. False
  34. a magnet
  35. True
  36. True
  37. sugar
  38. we measure it
  39. sand
  40. sawdust

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