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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 733 · 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.⚖️ 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) False (b) True
  2. 2.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
  3. 3.🧂 Which of these does not dissolve in water? (a) small pebbles (b) glucose powder (c) table salt (d) baking soda
  4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
  5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
  6. 6.True or false: food colour does not dissolve in water. (a) False (b) True
  7. 7.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
  8. 8.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
  9. 9.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  10. 10.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
  11. 11.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
  12. 12.True or false: warm water is needed for growing salt crystals. (a) False (b) True
  13. 13.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
  14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
  15. 15.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  16. 16.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) small pebbles (d) table salt
  17. 17.True or false: cooking an egg is a change that can be undone. (a) True (b) False
  18. 18.⚖️ 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 same dish (c) sunny or shady place
  19. 19.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) fish make it (d) sea water evaporates
  20. 20.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting ice (c) folding paper (d) freezing water
  21. 21.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  22. 22.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
  23. 23.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) salt (c) a piece of string (d) warm water
  24. 24.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) salt (c) yeast (d) a balloon
  25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
  26. 26.True or false: chalk powder dissolves in water. (a) True (b) False
  27. 27.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
  28. 28.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
  29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
  30. 30.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  31. 31.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
  32. 32.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a magnet (d) warm water
  33. 33.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) glucose powder (d) sand
  34. 34.🧈 Which of these is a change that can be undone? (a) rusting iron (b) freezing water (c) baking a cake (d) milk turning to curd
  35. 35.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a mirror (c) warm water (d) a spoon
  36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) turmeric powder
  37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
  38. 38.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
  39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) a battery cell
  40. 40.True or false: table salt does not dissolve in water. (a) False (b) True

Answer key

  1. False
  2. cannot be undone
  3. small pebbles
  4. we keep it the same
  5. saturated
  6. False
  7. can be undone
  8. False
  9. not needed
  10. False
  11. False
  12. True
  13. safe from small children
  14. bigger crystals
  15. not needed
  16. table salt
  17. False
  18. the same dish
  19. sea water evaporates
  20. rusting iron
  21. needed
  22. not needed
  23. yeast
  24. salt
  25. a grown-up
  26. False
  27. to make it very salty
  28. can be undone
  29. few or no crystals
  30. True
  31. does not dissolve
  32. warm water
  33. glucose powder
  34. freezing water
  35. a mirror
  36. turmeric powder
  37. we keep it the same
  38. True
  39. a battery cell
  40. False

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