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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 670 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
  2. 2.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
  3. 3.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sawdust (d) sugar
  4. 4.True or false: sawdust does not dissolve in water. (a) True (b) False
  5. 5.True or false: sawdust dissolves in water. (a) True (b) False
  6. 6.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  7. 7.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
  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 keep it the same (b) we measure it (c) we change it
  9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) warm water (d) a magnet
  10. 10.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
  11. 11.True or false: freezing water is a change that cannot be undone. (a) False (b) True
  12. 12.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
  13. 13.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
  14. 14.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) cooking an egg (d) baking a cake
  15. 15.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) baking soda (d) sugar
  16. 16.🔍 Which is the odd one out? (a) sand (b) sawdust (c) small pebbles (d) food colour
  17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
  18. 18.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) food colour (d) baking soda
  19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
  20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a balloon
  21. 21.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) a shallow dish (d) salt
  22. 22.True or false: salt is needed for growing salt crystals. (a) False (b) True
  23. 23.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  24. 24.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
  25. 25.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
  26. 26.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
  27. 27.True or false: melting ice is a change that cannot be undone. (a) True (b) False
  28. 28.⚖️ 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) True (b) False
  29. 29.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
  30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the same dish (c) days to see crystals (d) sunny or shady place
  31. 31.⚖️ 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) True (b) False
  32. 32.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  33. 33.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
  34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a magnet (d) a piece of string
  35. 35.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) a battery cell
  37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) warm water (d) a mirror
  38. 38.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
  40. 40.True or false: cooking an egg is a change that can be undone. (a) False (b) True

Answer key

  1. a grown-up
  2. does not dissolve
  3. sawdust
  4. True
  5. False
  6. needed
  7. does not dissolve
  8. we change it
  9. a magnet
  10. dissolves in water
  11. False
  12. True
  13. safe from small children
  14. freezing water
  15. sawdust
  16. food colour
  17. False
  18. chalk powder
  19. True
  20. a balloon
  21. yeast
  22. True
  23. can be undone
  24. few or no crystals
  25. cannot be undone
  26. water evaporates
  27. False
  28. True
  29. dissolves in water
  30. days to see crystals
  31. True
  32. needed
  33. True
  34. a magnet
  35. needed
  36. a battery cell
  37. a mirror
  38. does not dissolve
  39. bigger crystals
  40. False

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