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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 164 · 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 change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
  2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the same dish (b) days to see crystals (c) the amount of salt (d) sunny or shady place
  3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
  4. 4.True or false: freezing water is a change that cannot be undone. (a) True (b) False
  5. 5.⚖️ 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) False (b) True
  6. 6.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a shallow dish (c) turmeric powder (d) a balloon
  7. 7.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a piece of string (d) a magnet
  8. 8.True or false: melting butter is a change that can be undone. (a) False (b) True
  9. 9.⚖️ 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
  10. 10.True or false: baking soda does not dissolve in water. (a) False (b) True
  11. 11.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
  12. 12.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
  13. 13.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) cooking oil (d) food colour
  14. 14.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
  15. 15.True or false: warm water is needed for growing salt crystals. (a) False (b) True
  16. 16.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a mirror (c) warm water (d) a shallow dish
  17. 17.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
  18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
  19. 19.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) baking soda (d) chalk powder
  20. 20.True or false: folding paper is a change that can be undone. (a) True (b) False
  21. 21.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting ice (c) freezing water (d) folding paper
  22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
  23. 23.⚖️ 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
  24. 24.True or false: baking a cake is a change that can be undone. (a) True (b) False
  25. 25.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) browning lemon ink (d) freezing water
  26. 26.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  27. 27.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) cooking oil (d) sand
  28. 28.True or false: cooking oil dissolves in water. (a) False (b) True
  29. 29.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sawdust (d) table salt
  30. 30.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) baking soda (d) sand
  31. 31.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
  32. 32.True or false: small pebbles does not dissolve in water. (a) True (b) False
  33. 33.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) baking a cake (d) milk turning to curd
  34. 34.⚖️ 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
  35. 35.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) table salt (d) baking soda
  36. 36.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  37. 37.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  38. 38.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  39. 39.True or false: food colour dissolves in water. (a) True (b) False
  40. 40.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) warm water (d) a spoon

Answer key

  1. to make it very salty
  2. days to see crystals
  3. bigger crystals
  4. False
  5. False
  6. a shallow dish
  7. a magnet
  8. True
  9. False
  10. False
  11. True
  12. can be undone
  13. cooking oil
  14. True
  15. True
  16. a mirror
  17. not needed
  18. a grown-up
  19. baking soda
  20. True
  21. milk turning to curd
  22. saturated
  23. we measure it
  24. False
  25. browning lemon ink
  26. needed
  27. table salt
  28. False
  29. sawdust
  30. sand
  31. False
  32. True
  33. folding paper
  34. we keep it the same
  35. cooking oil
  36. needed
  37. needed
  38. not needed
  39. True
  40. a battery cell

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