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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 371 · 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.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  2. 2.⚖️ 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 keep it the same (c) we change it
  3. 3.🔮 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
  4. 4.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  5. 5.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
  6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
  7. 7.🧈 Which of these is a change that can be undone? (a) folding paper (b) baking a cake (c) milk turning to curd (d) rusting iron
  8. 8.⚖️ 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 keep it the same (b) we measure it (c) we change it
  9. 9.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
  10. 10.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
  11. 11.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) sawdust (d) sugar
  12. 12.True or false: baking a cake is a change that can be undone. (a) False (b) True
  13. 13.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
  14. 14.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  15. 15.True or false: yeast is needed for growing salt crystals. (a) False (b) True
  16. 16.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  17. 17.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  18. 18.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  19. 19.⚖️ 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 keep it the same (b) we change it (c) we measure it
  20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
  21. 21.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) baking soda (d) sugar
  22. 22.True or false: dissolving salt is a change that can be undone. (a) True (b) False
  23. 23.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) small pebbles (d) sugar
  25. 25.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
  26. 26.True or false: baking soda dissolves in water. (a) True (b) False
  27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a battery cell (d) a shallow dish
  28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) yeast (c) warm water (d) a shallow dish
  29. 29.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
  30. 30.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
  31. 31.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) baking a cake (d) melting ice
  32. 32.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  33. 33.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a magnet (d) salt
  34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
  35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) salt (d) a spoon
  36. 36.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting ice (c) freezing water (d) dissolving salt
  37. 37.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) chalk powder (d) sugar
  38. 38.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
  39. 39.⚖️ 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 change it (c) we keep it the same
  40. 40.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) food colour (d) sawdust

Answer key

  1. not needed
  2. we keep it the same
  3. few or no crystals
  4. needed
  5. dissolves in water
  6. False
  7. folding paper
  8. we keep it the same
  9. cannot be undone
  10. sugar crystals form
  11. sugar
  12. False
  13. bigger crystals
  14. not needed
  15. False
  16. can be undone
  17. dissolves in water
  18. cannot be undone
  19. we change it
  20. a grown-up
  21. chalk powder
  22. True
  23. True
  24. small pebbles
  25. can be undone
  26. True
  27. a battery cell
  28. yeast
  29. needed
  30. False
  31. baking a cake
  32. needed
  33. salt
  34. saturated
  35. a mirror
  36. rusting iron
  37. chalk powder
  38. does not dissolve
  39. we keep it the same
  40. food colour

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