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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 44 · 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 a change that can be undone? (a) cooking an egg (b) melting ice (c) baking a cake (d) browning lemon ink
  2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a battery cell (d) warm water
  3. 3.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) small pebbles (d) table salt
  4. 4.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  5. 5.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting ice (c) folding paper (d) freezing water
  6. 6.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
  7. 7.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) small pebbles (d) glucose powder
  8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) the kind of salt (d) the amount of salt
  9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
  10. 10.True or false: dissolving salt is a change that can be undone. (a) False (b) True
  11. 11.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
  12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
  13. 13.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
  14. 14.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  15. 15.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
  16. 16.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) baking a cake (c) cooking an egg (d) milk turning to curd
  17. 17.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to cool the water (d) to make it fizz
  18. 18.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
  19. 19.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
  20. 20.True or false: sawdust does not dissolve in water. (a) True (b) False
  21. 21.True or false: melting butter is a change that cannot be undone. (a) False (b) True
  22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
  23. 23.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
  24. 24.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  25. 25.True or false: cooking an egg is a change that can be undone. (a) False (b) True
  26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a balloon (d) a shallow dish
  27. 27.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
  28. 28.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
  29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
  30. 30.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  31. 31.🔍 Which is the odd one out? (a) sugar (b) table salt (c) glucose powder (d) small pebbles
  32. 32.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
  33. 33.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
  34. 34.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
  35. 35.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) small pebbles (d) sawdust
  36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
  37. 37.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
  38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
  39. 39.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
  40. 40.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False

Answer key

  1. melting ice
  2. a battery cell
  3. small pebbles
  4. not needed
  5. milk turning to curd
  6. cannot be undone
  7. glucose powder
  8. days to see crystals
  9. False
  10. True
  11. can be undone
  12. a grown-up
  13. tiny cubes
  14. does not dissolve
  15. False
  16. dissolving salt
  17. to make it very salty
  18. dissolves in water
  19. False
  20. True
  21. False
  22. False
  23. needed
  24. needed
  25. False
  26. a balloon
  27. water evaporates
  28. not needed
  29. True
  30. not needed
  31. small pebbles
  32. dissolves in water
  33. not needed
  34. safe from small children
  35. sugar
  36. we change it
  37. can be undone
  38. sugar crystals form
  39. needed
  40. True

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