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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 939 · 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 does not dissolve in water? (a) table salt (b) sand (c) sugar (d) food colour
  2. 2.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
  3. 3.🔮 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
  4. 4.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
  6. 6.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) glucose powder (d) food colour
  7. 7.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
  8. 8.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting ice (d) rusting iron
  9. 9.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  10. 10.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) baking soda (d) small pebbles
  11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
  12. 12.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
  13. 13.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a spoon (d) a magnet
  14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
  15. 15.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
  16. 16.⚖️ 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 amount of salt (b) days to see crystals (c) the amount of water (d) sunny or shady place
  17. 17.True or false: glucose powder does not dissolve in water. (a) True (b) False
  18. 18.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
  19. 19.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
  20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) turmeric powder
  21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
  22. 22.🔍 Which is the odd one out? (a) sand (b) baking soda (c) sugar (d) food colour
  23. 23.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
  24. 24.True or false: baking soda does not dissolve in water. (a) True (b) False
  25. 25.⚖️ 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) False (b) True
  26. 26.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
  27. 27.True or false: folding paper is a change that can be undone. (a) True (b) False
  28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
  29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a battery cell (d) a spoon
  30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
  31. 31.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
  32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) salt (d) yeast
  33. 33.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
  34. 34.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) cooking oil (d) sand
  35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
  36. 36.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  37. 37.True or false: yeast is needed for growing salt crystals. (a) False (b) True
  38. 38.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  39. 39.True or false: folding paper is a change that cannot be undone. (a) True (b) False
  40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) a mirror (d) salt

Answer key

  1. sand
  2. cannot be undone
  3. few or no crystals
  4. not needed
  5. True
  6. chalk powder
  7. dissolves in water
  8. rusting iron
  9. cannot be undone
  10. baking soda
  11. we change it
  12. dissolves in water
  13. a magnet
  14. tiny cubes
  15. False
  16. sunny or shady place
  17. False
  18. True
  19. sea water evaporates
  20. turmeric powder
  21. bigger crystals
  22. sand
  23. True
  24. False
  25. False
  26. False
  27. True
  28. False
  29. a battery cell
  30. we keep it the same
  31. does not dissolve
  32. salt
  33. does not dissolve
  34. food colour
  35. a grown-up
  36. not needed
  37. False
  38. needed
  39. False
  40. a mirror

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