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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 218 · 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.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to change its colour (d) to make it very salty
  2. 2.⚖️ 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 change it (b) we measure it (c) we keep it the same
  3. 3.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
  4. 4.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
  5. 5.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) sawdust (d) food colour
  6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) sunny or shady place (c) the amount of water (d) the same dish
  7. 7.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  8. 8.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a magnet (c) a battery cell (d) a balloon
  9. 9.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
  10. 10.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
  11. 11.True or false: sugar does not dissolve in water. (a) False (b) True
  12. 12.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
  13. 13.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt grows roots (d) salt eats water
  14. 14.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
  16. 16.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
  17. 17.🌊 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
  18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a battery cell (d) a spoon
  19. 19.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
  20. 20.True or false: glucose powder dissolves in water. (a) False (b) True
  21. 21.🔍 Which is the odd one out? (a) sawdust (b) sand (c) cooking oil (d) glucose powder
  22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a shallow dish (d) a mirror
  23. 23.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
  24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) a balloon
  25. 25.⚖️ 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
  26. 26.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
  27. 27.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
  28. 28.True or false: baking soda does not dissolve in water. (a) False (b) True
  29. 29.True or false: salt is needed for growing salt crystals. (a) False (b) True
  30. 30.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
  31. 31.True or false: sand dissolves in water. (a) True (b) False
  32. 32.True or false: salt is not needed for growing salt crystals. (a) True (b) False
  33. 33.🛟 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
  34. 34.True or false: baking soda dissolves in water. (a) True (b) False
  35. 35.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
  36. 36.True or false: cooking oil does not dissolve in water. (a) False (b) True
  37. 37.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
  39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) salt (d) a magnet
  40. 40.⚖️ 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

Answer key

  1. to make it very salty
  2. we measure it
  3. few or no crystals
  4. False
  5. food colour
  6. sunny or shady place
  7. not needed
  8. warm water
  9. True
  10. needed
  11. False
  12. can be undone
  13. water evaporates
  14. not needed
  15. False
  16. cannot be undone
  17. sea water evaporates
  18. a battery cell
  19. True
  20. True
  21. glucose powder
  22. a mirror
  23. does not dissolve
  24. a balloon
  25. False
  26. True
  27. can be undone
  28. False
  29. True
  30. not needed
  31. False
  32. False
  33. a grown-up
  34. True
  35. needed
  36. True
  37. not needed
  38. bigger crystals
  39. a magnet
  40. False

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