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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 98 · 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.True or false: sawdust dissolves in water. (a) False (b) True
  2. 2.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
  3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
  4. 4.⚖️ 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) True (b) False
  5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we measure it (c) we keep it the same
  6. 6.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  7. 7.⚖️ 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) the amount of water (c) days to see crystals (d) the kind of salt
  8. 8.🛟 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
  9. 9.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
  10. 10.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) warm water (d) a balloon
  11. 11.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) folding paper (d) melting butter
  12. 12.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
  13. 13.⚖️ 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
  14. 14.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
  15. 15.True or false: food colour dissolves in water. (a) True (b) False
  16. 16.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
  17. 17.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
  18. 18.🧺 Which of these is needed for growing salt crystals? (a) salt (b) turmeric powder (c) a balloon (d) yeast
  19. 19.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
  20. 20.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a piece of string (d) a shallow dish
  21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
  22. 22.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  23. 23.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  24. 24.True or false: salt is needed for growing salt crystals. (a) True (b) False
  25. 25.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
  26. 26.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
  27. 27.True or false: melting butter is a change that cannot be undone. (a) True (b) False
  28. 28.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting ice (c) dissolving salt (d) freezing water
  29. 29.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
  30. 30.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  31. 31.True or false: freezing water is a change that cannot be undone. (a) False (b) True
  32. 32.🧂 Which of these dissolves in water? (a) table salt (b) sand (c) chalk powder (d) cooking oil
  33. 33.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
  34. 34.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
  35. 35.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
  36. 36.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
  37. 37.🔍 Which is the odd one out? (a) table salt (b) food colour (c) glucose powder (d) small pebbles
  38. 38.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) warm water (d) a spoon
  40. 40.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) fish make it (d) sea water evaporates

Answer key

  1. False
  2. safe from small children
  3. tiny cubes
  4. False
  5. we keep it the same
  6. not needed
  7. days to see crystals
  8. a grown-up
  9. needed
  10. warm water
  11. browning lemon ink
  12. False
  13. True
  14. not needed
  15. True
  16. not needed
  17. True
  18. salt
  19. True
  20. a magnet
  21. we keep it the same
  22. cannot be undone
  23. cannot be undone
  24. True
  25. does not dissolve
  26. False
  27. False
  28. baking a cake
  29. water evaporates
  30. not needed
  31. False
  32. table salt
  33. does not dissolve
  34. False
  35. cannot be undone
  36. can be undone
  37. small pebbles
  38. dissolves in water
  39. a magnet
  40. sea water evaporates

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