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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 678 · 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.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) frozen (d) empty
  2. 2.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
  3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
  4. 4.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
  5. 5.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) chalk powder (d) food colour
  6. 6.🔮 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
  7. 7.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
  8. 8.True or false: salt is not needed for growing salt crystals. (a) False (b) True
  9. 9.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
  10. 10.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  11. 11.True or false: baking soda dissolves in water. (a) False (b) True
  12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
  13. 13.True or false: sugar dissolves in water. (a) True (b) False
  14. 14.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
  15. 15.⚖️ 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
  16. 16.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) glucose powder (d) cooking oil
  17. 17.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  18. 18.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
  19. 19.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
  20. 20.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of salt
  21. 21.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
  22. 22.🧂 Which of these dissolves in water? (a) sugar (b) sawdust (c) cooking oil (d) small pebbles
  23. 23.True or false: food colour does not dissolve in water. (a) False (b) True
  24. 24.True or false: small pebbles dissolves in water. (a) True (b) False
  25. 25.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) salt grows roots (d) the dish melts
  26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a shallow dish (d) warm water
  27. 27.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a piece of string (d) a balloon
  28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) turmeric powder
  29. 29.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  30. 30.🧈 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
  31. 31.🔍 Which is the odd one out? (a) table salt (b) food colour (c) small pebbles (d) baking soda
  32. 32.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  33. 33.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a shallow dish (d) a mirror
  34. 34.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
  35. 35.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) cooking oil (d) sugar
  36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
  37. 37.⚖️ 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
  38. 38.🧈 Which of these is a change that can be undone? (a) freezing water (b) baking a cake (c) browning lemon ink (d) milk turning to curd
  39. 39.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
  40. 40.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) glucose powder

Answer key

  1. saturated
  2. can be undone
  3. False
  4. dissolves in water
  5. food colour
  6. few or no crystals
  7. dissolves in water
  8. False
  9. dissolves in water
  10. not needed
  11. True
  12. a grown-up
  13. True
  14. needed
  15. we measure it
  16. glucose powder
  17. cannot be undone
  18. sea water evaporates
  19. True
  20. days to see crystals
  21. True
  22. sugar
  23. False
  24. False
  25. water evaporates
  26. a magnet
  27. a piece of string
  28. turmeric powder
  29. dissolves in water
  30. folding paper
  31. small pebbles
  32. not needed
  33. a mirror
  34. sugar crystals form
  35. sugar
  36. False
  37. we change it
  38. freezing water
  39. False
  40. glucose powder

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