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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 35 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) warm water (d) salt
  2. 2.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
  3. 3.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
  4. 4.⚖️ 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
  5. 5.True or false: glucose powder does not dissolve in water. (a) True (b) False
  6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a balloon (d) a spoon
  7. 7.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  8. 8.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
  9. 9.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
  10. 10.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a balloon (c) a spoon (d) a piece of string
  11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
  12. 12.True or false: sawdust dissolves in water. (a) False (b) True
  13. 13.True or false: warm water is needed for growing salt crystals. (a) False (b) True
  14. 14.True or false: sand does not dissolve in water. (a) True (b) False
  15. 15.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
  16. 16.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
  17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a piece of string (c) warm water (d) salt
  18. 18.True or false: sugar dissolves in water. (a) False (b) True
  19. 19.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
  20. 20.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) milk turning to curd (c) browning lemon ink (d) baking a cake
  21. 21.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) baking a cake (d) freezing water
  22. 22.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
  23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
  25. 25.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
  26. 26.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) chalk powder (d) food colour
  27. 27.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) sugar (d) food colour
  28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
  29. 29.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) empty (d) frozen
  30. 30.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) warm water (d) yeast
  31. 31.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) browning lemon ink (c) dissolving salt (d) freezing water
  32. 32.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) chalk powder (d) baking soda
  33. 33.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
  34. 34.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
  35. 35.True or false: freezing water is a change that can be undone. (a) True (b) False
  36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a mirror (d) warm water
  37. 37.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a battery cell (d) a piece of string
  38. 38.⚖️ 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 change it (c) we measure it
  39. 39.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  40. 40.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) folding paper (d) baking a cake

Answer key

  1. a magnet
  2. cannot be undone
  3. to make it very salty
  4. we keep it the same
  5. False
  6. a balloon
  7. not needed
  8. True
  9. True
  10. a balloon
  11. False
  12. False
  13. True
  14. True
  15. True
  16. False
  17. a mirror
  18. True
  19. can be undone
  20. dissolving salt
  21. freezing water
  22. tiny cubes
  23. needed
  24. the amount of water
  25. True
  26. chalk powder
  27. sand
  28. few or no crystals
  29. saturated
  30. warm water
  31. browning lemon ink
  32. baking soda
  33. a grown-up
  34. can be undone
  35. True
  36. a mirror
  37. a piece of string
  38. we measure it
  39. dissolves in water
  40. folding paper

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