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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 672 · 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 piece of string for growing salt crystals? (a) not needed (b) needed
  2. 2.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
  3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
  4. 4.True or false: folding paper is a change that cannot be undone. (a) False (b) True
  5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) warm water (d) a magnet
  6. 6.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
  7. 7.True or false: cooking an egg is a change that can be undone. (a) True (b) False
  8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
  9. 9.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) sand (d) table salt
  10. 10.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) small pebbles (d) sugar
  11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a mirror (d) a shallow dish
  12. 12.True or false: freezing water is a change that cannot be undone. (a) True (b) False
  13. 13.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  14. 14.⚖️ 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 same dish
  15. 15.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) dissolving salt (c) freezing water (d) melting butter
  16. 16.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) glucose powder (d) food colour
  17. 17.🔮 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
  18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a shallow dish (d) yeast
  19. 19.True or false: melting ice is a change that cannot be undone. (a) True (b) False
  20. 20.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) baking a cake (c) folding paper (d) freezing water
  21. 21.🧂 Which of these dissolves in water? (a) small pebbles (b) sugar (c) sawdust (d) chalk powder
  22. 22.True or false: chalk powder dissolves in water. (a) True (b) False
  23. 23.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  24. 24.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) warm water (c) a mirror (d) a magnet
  25. 25.🧂 Does glucose powder 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 “sunny or shady place”? (a) we measure it (b) we change it (c) we keep it the same
  27. 27.True or false: food colour does not dissolve in water. (a) True (b) False
  28. 28.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  29. 29.⚖️ 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) True (b) False
  30. 30.⚖️ 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
  31. 31.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
  32. 32.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) food colour (d) chalk powder
  33. 33.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
  34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
  35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a piece of string (d) turmeric powder
  36. 36.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
  37. 37.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  38. 38.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
  39. 39.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  40. 40.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a piece of string (c) a balloon (d) a magnet

Answer key

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

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