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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 318 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
  2. 2.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
  3. 3.True or false: warm water is needed for growing salt crystals. (a) False (b) True
  4. 4.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a mirror (d) a magnet
  5. 5.🔮 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
  6. 6.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
  7. 7.True or false: cooking an egg is a change that can be undone. (a) True (b) False
  8. 8.⚖️ 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 measure it (b) we change it (c) we keep it the same
  9. 9.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
  10. 10.⚖️ 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
  11. 11.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) sugar (d) table salt
  12. 12.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
  13. 13.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) melting ice (d) milk turning to curd
  14. 14.True or false: melting ice is a change that can be undone. (a) False (b) True
  15. 15.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
  16. 16.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) rusting iron (d) melting ice
  17. 17.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  18. 18.🧂 Which of these dissolves in water? (a) sand (b) food colour (c) chalk powder (d) cooking oil
  19. 19.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
  20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a battery cell (d) a spoon
  21. 21.True or false: folding paper is a change that cannot be undone. (a) False (b) True
  22. 22.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
  23. 23.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
  24. 24.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
  25. 25.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
  26. 26.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
  27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
  28. 28.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) sand (d) glucose powder
  29. 29.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  30. 30.⚖️ 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 change it (c) we measure it
  31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a mirror (d) salt
  32. 32.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  33. 33.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) folding paper (d) cooking an egg
  34. 34.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) warm water (c) a balloon (d) a magnet
  35. 35.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) turmeric powder (d) salt
  36. 36.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
  37. 37.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
  38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) warm water (d) salt
  39. 39.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
  40. 40.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed

Answer key

  1. a grown-up
  2. can be undone
  3. True
  4. a spoon
  5. few or no crystals
  6. can be undone
  7. False
  8. we keep it the same
  9. water evaporates
  10. True
  11. small pebbles
  12. False
  13. melting ice
  14. True
  15. does not dissolve
  16. rusting iron
  17. dissolves in water
  18. food colour
  19. does not dissolve
  20. a battery cell
  21. False
  22. cannot be undone
  23. not needed
  24. False
  25. False
  26. False
  27. we keep it the same
  28. glucose powder
  29. not needed
  30. we keep it the same
  31. a mirror
  32. True
  33. folding paper
  34. warm water
  35. turmeric powder
  36. does not dissolve
  37. tiny cubes
  38. yeast
  39. safe from small children
  40. not needed

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