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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 889 · 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) the kind of salt (c) sunny or shady place (d) the same dish
  2. 2.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a mirror (d) warm water
  3. 3.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sawdust (d) sugar
  4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
  5. 5.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) baking soda (d) chalk powder
  6. 6.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
  7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a piece of string (d) turmeric powder
  8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
  9. 9.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
  10. 10.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) rusting iron (d) cooking an egg
  11. 11.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
  12. 12.True or false: baking a cake is a change that can be undone. (a) False (b) True
  13. 13.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
  14. 14.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  15. 15.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) rusting iron (d) dissolving salt
  16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
  17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
  18. 18.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
  19. 19.🧂 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) baking soda (d) table salt
  20. 20.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  21. 21.⚖️ 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 keep it the same (b) we measure it (c) we change it
  22. 22.True or false: sugar dissolves in water. (a) False (b) True
  23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a battery cell (d) salt
  24. 24.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a battery cell (d) a shallow dish
  25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a piece of string (d) a magnet
  26. 26.🔍 Which is the odd one out? (a) table salt (b) sugar (c) baking soda (d) sawdust
  27. 27.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a piece of string (d) a battery cell
  28. 28.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
  29. 29.True or false: freezing water is a change that can be undone. (a) False (b) True
  30. 30.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a balloon (d) warm water
  31. 31.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
  32. 32.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
  33. 33.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) chalk powder (d) sugar
  34. 34.True or false: folding paper is a change that cannot be undone. (a) True (b) False
  35. 35.True or false: salt is needed for growing salt crystals. (a) False (b) True
  36. 36.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
  37. 37.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
  38. 38.True or false: cooking oil does not dissolve in water. (a) False (b) True
  39. 39.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a spoon (c) turmeric powder (d) a mirror
  40. 40.True or false: small pebbles dissolves in water. (a) True (b) False

Answer key

  1. sunny or shady place
  2. warm water
  3. sugar
  4. bigger crystals
  5. baking soda
  6. safe from small children
  7. turmeric powder
  8. a grown-up
  9. True
  10. melting butter
  11. needed
  12. False
  13. True
  14. not needed
  15. dissolving salt
  16. not needed
  17. few or no crystals
  18. can be undone
  19. chalk powder
  20. needed
  21. we measure it
  22. True
  23. a battery cell
  24. a shallow dish
  25. a magnet
  26. sawdust
  27. a piece of string
  28. water evaporates
  29. True
  30. a balloon
  31. False
  32. True
  33. sugar
  34. False
  35. True
  36. False
  37. False
  38. True
  39. a spoon
  40. False

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