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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 53 · 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.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a piece of string (d) a magnet
  2. 2.True or false: small pebbles does not dissolve in water. (a) False (b) True
  3. 3.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
  4. 4.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
  5. 5.True or false: chalk powder dissolves in water. (a) False (b) True
  6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
  7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a balloon (c) salt (d) warm water
  8. 8.True or false: sugar does not dissolve in water. (a) True (b) False
  9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
  10. 10.True or false: salt is needed for growing salt crystals. (a) True (b) False
  11. 11.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) chalk powder (d) baking soda
  12. 12.True or false: sand dissolves in water. (a) True (b) False
  13. 13.⚖️ 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) the kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of salt
  14. 14.True or false: food colour does not dissolve in water. (a) True (b) False
  15. 15.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
  16. 16.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
  17. 17.⚖️ 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 keep it the same (c) we measure it
  18. 18.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
  19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
  20. 20.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) cooking oil (d) table salt
  21. 21.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
  22. 22.True or false: sugar dissolves in water. (a) True (b) False
  23. 23.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) browning lemon ink (d) melting ice
  24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a spoon (d) a battery cell
  25. 25.True or false: sand does not dissolve in water. (a) False (b) True
  26. 26.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) glucose powder (d) cooking oil
  27. 27.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  28. 28.True or false: melting ice is a change that cannot be undone. (a) False (b) True
  29. 29.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) sawdust (d) food colour
  31. 31.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) freezing water (d) milk turning to curd
  32. 32.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) small pebbles (d) sugar
  33. 33.True or false: rusting iron is a change that can be undone. (a) True (b) False
  34. 34.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
  35. 35.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  36. 36.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
  37. 37.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
  38. 38.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) sawdust (d) sand
  39. 39.🧂 Which of these does not dissolve in water? (a) sand (b) baking soda (c) glucose powder (d) sugar
  40. 40.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) browning lemon ink (d) folding paper

Answer key

  1. a piece of string
  2. True
  3. few or no crystals
  4. False
  5. False
  6. False
  7. a balloon
  8. False
  9. we keep it the same
  10. True
  11. chalk powder
  12. False
  13. sunny or shady place
  14. False
  15. can be undone
  16. not needed
  17. we measure it
  18. False
  19. a grown-up
  20. cooking oil
  21. to make it very salty
  22. True
  23. melting ice
  24. a battery cell
  25. True
  26. cooking oil
  27. needed
  28. False
  29. False
  30. food colour
  31. milk turning to curd
  32. small pebbles
  33. False
  34. sea water evaporates
  35. dissolves in water
  36. cannot be undone
  37. not needed
  38. baking soda
  39. sand
  40. browning lemon ink

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