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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 235 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of water (b) days to see crystals (c) the amount of salt (d) sunny or shady place
  2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) a battery cell
  3. 3.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
  4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
  5. 5.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
  6. 6.🧂 Which of these dissolves in water? (a) glucose powder (b) sawdust (c) small pebbles (d) chalk powder
  7. 7.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) salt (d) a shallow dish
  9. 9.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sugar (d) cooking oil
  10. 10.True or false: dissolving salt is a change that can be undone. (a) False (b) True
  11. 11.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
  12. 12.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  13. 13.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
  15. 15.⚖️ 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 amount of salt (b) the kind of salt (c) sunny or shady place (d) days to see crystals
  16. 16.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
  17. 17.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) warm water (d) turmeric powder
  18. 18.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
  19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
  20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we measure it (b) we keep it the same (c) we change it
  21. 21.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  22. 22.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
  23. 23.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
  24. 24.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
  25. 25.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) melting ice (d) rusting iron
  26. 26.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) food colour (d) sand
  27. 27.True or false: small pebbles does not dissolve in water. (a) False (b) True
  28. 28.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) small pebbles (d) sand
  29. 29.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
  30. 30.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
  31. 31.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  32. 32.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a magnet (d) a piece of string
  34. 34.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
  35. 35.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
  36. 36.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) a balloon (d) yeast
  37. 37.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
  38. 38.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
  39. 39.True or false: small pebbles dissolves in water. (a) True (b) False
  40. 40.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone

Answer key

  1. sunny or shady place
  2. a battery cell
  3. water evaporates
  4. True
  5. needed
  6. glucose powder
  7. needed
  8. a mirror
  9. sugar
  10. True
  11. True
  12. does not dissolve
  13. can be undone
  14. few or no crystals
  15. days to see crystals
  16. sugar crystals form
  17. warm water
  18. cannot be undone
  19. we keep it the same
  20. we measure it
  21. cannot be undone
  22. dissolves in water
  23. a grown-up
  24. False
  25. rusting iron
  26. food colour
  27. True
  28. sugar
  29. needed
  30. not needed
  31. needed
  32. not needed
  33. a magnet
  34. cannot be undone
  35. not needed
  36. salt
  37. dissolves in water
  38. safe from small children
  39. False
  40. can be undone

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