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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 694 · 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.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
  2. 2.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) sand (d) glucose powder
  3. 3.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting ice (c) freezing water (d) dissolving salt
  4. 4.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  5. 5.⚖️ 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
  6. 6.True or false: melting butter is a change that cannot be undone. (a) False (b) True
  7. 7.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
  8. 8.True or false: melting ice is a change that cannot be undone. (a) False (b) True
  9. 9.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) cooking oil (d) sugar
  10. 10.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
  11. 11.True or false: freezing water is a change that cannot be undone. (a) False (b) True
  12. 12.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
  14. 14.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
  15. 15.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
  16. 16.True or false: folding paper is a change that cannot be undone. (a) False (b) True
  17. 17.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
  18. 18.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  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 kind of salt (b) the same dish (c) the amount of salt (d) sunny or shady place
  20. 20.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  21. 21.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
  22. 22.True or false: small pebbles dissolves in water. (a) True (b) False
  23. 23.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
  24. 24.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) cooking an egg (d) dissolving salt
  25. 25.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  26. 26.⚖️ 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 change it (c) we measure it
  27. 27.True or false: glucose powder dissolves in water. (a) True (b) False
  28. 28.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
  29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
  30. 30.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) baking soda (d) sand
  31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we change it (c) we measure it
  32. 32.True or false: sand dissolves in water. (a) False (b) True
  33. 33.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
  34. 34.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a mirror (c) a balloon (d) a magnet
  35. 35.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  36. 36.⚖️ 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
  37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
  38. 38.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) browning lemon ink (d) baking a cake
  39. 39.True or false: warm water is needed for growing salt crystals. (a) False (b) True
  40. 40.🔮 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

Answer key

  1. True
  2. sand
  3. browning lemon ink
  4. can be undone
  5. True
  6. False
  7. to make it very salty
  8. False
  9. sugar
  10. not needed
  11. False
  12. dissolves in water
  13. we keep it the same
  14. True
  15. water evaporates
  16. False
  17. a grown-up
  18. True
  19. sunny or shady place
  20. not needed
  21. False
  22. False
  23. dissolves in water
  24. dissolving salt
  25. dissolves in water
  26. we measure it
  27. True
  28. does not dissolve
  29. we keep it the same
  30. baking soda
  31. we keep it the same
  32. False
  33. needed
  34. warm water
  35. not needed
  36. the amount of water
  37. True
  38. melting ice
  39. True
  40. few or no crystals

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