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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 543 · 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 spoon (b) yeast (c) salt (d) a shallow dish
  2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
  3. 3.⚖️ 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
  4. 4.True or false: baking a cake is a change that can be undone. (a) True (b) False
  5. 5.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) baking soda (d) sawdust
  6. 6.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
  7. 7.🔍 Which is the odd one out? (a) cooking oil (b) glucose powder (c) food colour (d) baking soda
  8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we measure it (c) we keep it the same
  9. 9.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
  10. 10.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
  11. 11.True or false: table salt dissolves in water. (a) True (b) False
  12. 12.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
  13. 13.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
  14. 14.⚖️ 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 same dish (d) the amount of water
  15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) salt (d) a battery cell
  16. 16.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
  17. 17.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
  18. 18.🧂 Which of these does not dissolve in water? (a) cooking oil (b) sugar (c) glucose powder (d) table salt
  19. 19.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
  20. 20.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
  22. 22.True or false: sawdust does not dissolve in water. (a) True (b) False
  23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
  24. 24.True or false: salt is needed for growing salt crystals. (a) False (b) True
  25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a magnet (d) warm water
  26. 26.True or false: chalk powder does not dissolve in water. (a) False (b) True
  27. 27.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  28. 28.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  29. 29.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sugar (d) chalk powder
  30. 30.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
  31. 31.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  32. 32.🔍 Which is the odd one out? (a) table salt (b) food colour (c) chalk powder (d) glucose powder
  33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
  34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
  35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
  36. 36.🔍 Which is the odd one out? (a) sand (b) baking soda (c) sugar (d) food colour
  37. 37.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
  38. 38.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  39. 39.True or false: chalk powder dissolves in water. (a) True (b) False
  40. 40.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) cooking oil (d) baking soda

Answer key

  1. yeast
  2. bigger crystals
  3. we measure it
  4. False
  5. sawdust
  6. can be undone
  7. cooking oil
  8. we change it
  9. False
  10. dissolves in water
  11. True
  12. True
  13. True
  14. sunny or shady place
  15. a battery cell
  16. does not dissolve
  17. False
  18. cooking oil
  19. True
  20. not needed
  21. a grown-up
  22. True
  23. we keep it the same
  24. True
  25. a magnet
  26. True
  27. dissolves in water
  28. can be undone
  29. sugar
  30. False
  31. not needed
  32. chalk powder
  33. few or no crystals
  34. we keep it the same
  35. to make it very salty
  36. sand
  37. cannot be undone
  38. needed
  39. False
  40. baking soda

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