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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 429 · 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) glucose powder (b) sawdust (c) baking soda (d) sugar
  2. 2.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
  3. 3.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) salt rains down (d) fish make it
  4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
  5. 5.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) table salt (d) chalk powder
  6. 6.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
  7. 7.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
  8. 8.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) baking a cake (d) dissolving salt
  9. 9.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  10. 10.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
  11. 11.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  12. 12.⚖️ 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 keep it the same (b) we change it (c) we measure it
  13. 13.🔍 Which is the odd one out? (a) sand (b) sawdust (c) food colour (d) chalk powder
  14. 14.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) turmeric powder (d) a balloon
  15. 15.True or false: chalk powder does not dissolve in water. (a) False (b) True
  16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
  17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) a piece of string (d) a spoon
  18. 18.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sugar (d) sand
  19. 19.🛟 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
  20. 20.True or false: yeast is needed for growing salt crystals. (a) False (b) True
  21. 21.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
  22. 22.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
  23. 23.True or false: glucose powder does not dissolve in water. (a) True (b) False
  24. 24.⚖️ 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
  25. 25.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) baking soda (d) sand
  26. 26.True or false: sugar does not dissolve in water. (a) False (b) True
  27. 27.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  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 the one thing we change. (a) True (b) False
  29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) yeast (d) salt
  30. 30.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting butter (c) dissolving salt (d) freezing water
  31. 31.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
  32. 32.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) warm water (d) yeast
  33. 33.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  34. 34.🔍 Which is the odd one out? (a) sugar (b) table salt (c) cooking oil (d) glucose powder
  35. 35.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting butter (c) browning lemon ink (d) cooking an egg
  36. 36.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
  37. 37.True or false: rusting iron is a change that can be undone. (a) True (b) False
  38. 38.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
  39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the kind of salt
  40. 40.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) food colour (d) sawdust

Answer key

  1. sawdust
  2. can be undone
  3. sea water evaporates
  4. few or no crystals
  5. chalk powder
  6. not needed
  7. safe from small children
  8. dissolving salt
  9. needed
  10. True
  11. not needed
  12. we change it
  13. food colour
  14. a piece of string
  15. True
  16. False
  17. a balloon
  18. sugar
  19. a grown-up
  20. False
  21. needed
  22. tiny cubes
  23. False
  24. True
  25. baking soda
  26. False
  27. needed
  28. True
  29. yeast
  30. browning lemon ink
  31. does not dissolve
  32. yeast
  33. needed
  34. cooking oil
  35. melting butter
  36. False
  37. False
  38. cannot be undone
  39. the kind of salt
  40. food colour

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