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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 129 · 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.

NameDateTime takenScore ___ / 40
  1. 1.True or false: cooking oil dissolves in water. (a) True (b) False
  2. 2.⚖️ 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) True (b) False
  3. 3.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) freezing water (d) milk turning to curd
  4. 4.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
  5. 5.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
  6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
  7. 7.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  8. 8.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) milk turning to curd (d) baking a cake
  9. 9.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
  10. 10.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
  11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
  12. 12.🔮 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
  13. 13.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) milk turning to curd (d) melting ice
  14. 14.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) food colour (d) sand
  15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
  16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the kind of salt (c) days to see crystals
  17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
  18. 18.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
  19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) turmeric powder
  20. 20.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
  21. 21.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  22. 22.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
  23. 23.True or false: salt is needed for growing salt crystals. (a) True (b) False
  24. 24.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) cooking an egg (d) dissolving salt
  25. 25.True or false: salt is not needed for growing salt crystals. (a) False (b) True
  26. 26.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
  27. 27.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) small pebbles (d) cooking oil
  28. 28.🧂 Which of these dissolves in water? (a) chalk powder (b) sugar (c) sawdust (d) sand
  29. 29.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  30. 30.True or false: table salt does not dissolve in water. (a) False (b) True
  31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
  32. 32.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sawdust (d) baking soda
  33. 33.⚖️ 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) True (b) False
  34. 34.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
  35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) a spoon (d) a piece of string
  36. 36.True or false: warm water is needed for growing salt crystals. (a) True (b) False
  37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a spoon (c) a shallow dish (d) warm water
  38. 38.True or false: melting butter is a change that can be undone. (a) False (b) True
  39. 39.True or false: cooking oil does not dissolve in water. (a) False (b) True
  40. 40.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed

Answer key

  1. False
  2. True
  3. milk turning to curd
  4. saturated
  5. False
  6. sugar crystals form
  7. needed
  8. folding paper
  9. safe from small children
  10. False
  11. to make it very salty
  12. few or no crystals
  13. melting ice
  14. sand
  15. a grown-up
  16. the kind of salt
  17. bigger crystals
  18. not needed
  19. turmeric powder
  20. can be undone
  21. needed
  22. False
  23. True
  24. cooking an egg
  25. False
  26. needed
  27. glucose powder
  28. sugar
  29. does not dissolve
  30. False
  31. we keep it the same
  32. baking soda
  33. True
  34. False
  35. a battery cell
  36. True
  37. a balloon
  38. True
  39. True
  40. not needed

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