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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 142 · 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: salt is needed for growing salt crystals. (a) False (b) True
  2. 2.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
  3. 3.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) milk turning to curd (d) melting ice
  4. 4.True or false: sugar does not dissolve in water. (a) False (b) True
  5. 5.🔍 Which is the odd one out? (a) sand (b) sawdust (c) glucose powder (d) cooking oil
  6. 6.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
  7. 7.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
  8. 8.True or false: table salt does not dissolve in water. (a) False (b) True
  9. 9.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
  10. 10.🔮 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
  11. 11.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) sawdust (d) table salt
  12. 12.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
  13. 13.⚖️ 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) the amount of salt (c) sunny or shady place
  14. 14.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  15. 15.⚖️ 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
  16. 16.⚖️ 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
  17. 17.🧂 Which of these dissolves in water? (a) table salt (b) small pebbles (c) sand (d) cooking oil
  18. 18.True or false: freezing water is a change that can be undone. (a) False (b) True
  19. 19.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
  20. 20.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  21. 21.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
  22. 22.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
  23. 23.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a battery cell (c) salt (d) a spoon
  24. 24.True or false: melting ice is a change that cannot be undone. (a) True (b) False
  25. 25.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) food colour (d) chalk powder
  26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a spoon (d) turmeric powder
  27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a mirror
  28. 28.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
  29. 29.True or false: cooking an egg is a change that can be undone. (a) True (b) False
  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) days to see crystals (b) the amount of water (c) the kind of salt (d) sunny or shady place
  31. 31.⚖️ 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
  32. 32.🧺 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 magnet
  33. 33.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
  34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
  35. 35.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  36. 36.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  37. 37.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a magnet (d) salt
  38. 38.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
  39. 39.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
  40. 40.True or false: baking a cake is a change that can be undone. (a) True (b) False

Answer key

  1. True
  2. dissolves in water
  3. melting ice
  4. False
  5. glucose powder
  6. cannot be undone
  7. True
  8. False
  9. water evaporates
  10. few or no crystals
  11. sawdust
  12. can be undone
  13. the amount of salt
  14. can be undone
  15. False
  16. we keep it the same
  17. table salt
  18. True
  19. sea water evaporates
  20. can be undone
  21. not needed
  22. a grown-up
  23. a battery cell
  24. False
  25. chalk powder
  26. turmeric powder
  27. a mirror
  28. True
  29. False
  30. days to see crystals
  31. we measure it
  32. a magnet
  33. bigger crystals
  34. True
  35. not needed
  36. needed
  37. a magnet
  38. True
  39. False
  40. False

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