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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 69 · 40 questions
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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.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
  2. 2.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) baking soda (d) sawdust
  3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
  4. 4.🧂 Which of these does not dissolve in water? (a) food colour (b) cooking oil (c) sugar (d) table salt
  5. 5.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
  6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
  7. 7.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
  8. 8.True or false: sawdust does not dissolve in water. (a) True (b) False
  9. 9.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
  10. 10.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
  11. 11.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a magnet (c) yeast (d) turmeric powder
  12. 12.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) chalk powder (d) sugar
  13. 13.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
  14. 14.True or false: melting butter is a change that can be undone. (a) True (b) False
  15. 15.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
  16. 16.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
  17. 17.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) browning lemon ink (d) baking a cake
  18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
  19. 19.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a shallow dish (c) a battery cell (d) a balloon
  20. 20.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) cooking an egg (d) melting ice
  21. 21.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a spoon (c) a mirror (d) a magnet
  22. 22.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
  23. 23.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) small pebbles (d) sugar
  24. 24.True or false: warm water is needed for growing salt crystals. (a) False (b) True
  25. 25.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  26. 26.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
  27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) warm water (c) salt (d) a piece of string
  28. 28.⚖️ 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
  29. 29.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) small pebbles (d) sand
  30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
  31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
  32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) warm water (d) turmeric powder
  33. 33.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
  34. 34.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) fish make it (d) salt rains down
  35. 35.True or false: table salt does not dissolve in water. (a) True (b) False
  36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) yeast (d) warm water
  37. 37.True or false: salt is needed for growing salt crystals. (a) False (b) True
  38. 38.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
  39. 39.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
  40. 40.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) melting ice (d) cooking an egg

Answer key

  1. not needed
  2. baking soda
  3. True
  4. cooking oil
  5. can be undone
  6. a grown-up
  7. to make it very salty
  8. True
  9. dissolves in water
  10. not needed
  11. warm water
  12. sugar
  13. True
  14. True
  15. cannot be undone
  16. dissolves in water
  17. dissolving salt
  18. True
  19. a shallow dish
  20. cooking an egg
  21. a spoon
  22. dissolves in water
  23. small pebbles
  24. True
  25. needed
  26. True
  27. a battery cell
  28. we measure it
  29. glucose powder
  30. False
  31. tiny cubes
  32. turmeric powder
  33. cannot be undone
  34. sea water evaporates
  35. False
  36. yeast
  37. True
  38. few or no crystals
  39. can be undone
  40. melting ice

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