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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 153 · 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 is a change that can be undone? (a) cooking an egg (b) melting ice (c) browning lemon ink (d) milk turning to curd
  2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
  3. 3.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
  4. 4.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
  5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
  6. 6.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) sugar (d) food colour
  7. 7.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
  8. 8.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) browning lemon ink (d) milk turning to curd
  9. 9.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a magnet (c) a mirror (d) a balloon
  10. 10.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  11. 11.⚖️ 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
  12. 12.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
  13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
  14. 14.True or false: sand does not dissolve in water. (a) False (b) True
  15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a shallow dish (c) a spoon (d) warm water
  16. 16.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a spoon (d) yeast
  17. 17.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
  18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) salt (d) warm water
  19. 19.True or false: folding paper is a change that cannot be undone. (a) True (b) False
  20. 20.True or false: baking soda does not dissolve in water. (a) False (b) True
  21. 21.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) cooking oil (d) food colour
  22. 22.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
  23. 23.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  24. 24.🔍 Which is the odd one out? (a) table salt (b) food colour (c) chalk powder (d) sugar
  25. 25.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
  26. 26.True or false: salt is not needed for growing salt crystals. (a) False (b) True
  27. 27.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) glucose powder (d) small pebbles
  28. 28.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
  29. 29.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
  30. 30.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) a balloon (d) turmeric powder
  31. 31.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) a spoon (d) salt
  33. 33.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
  34. 34.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
  35. 35.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
  36. 36.True or false: folding paper is a change that can be undone. (a) True (b) False
  37. 37.True or false: cooking oil does not dissolve in water. (a) False (b) True
  38. 38.True or false: freezing water is a change that cannot be undone. (a) True (b) False
  39. 39.🧺 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 magnet
  40. 40.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals

Answer key

  1. melting ice
  2. True
  3. needed
  4. False
  5. tiny cubes
  6. sawdust
  7. cannot be undone
  8. freezing water
  9. a shallow dish
  10. needed
  11. we keep it the same
  12. does not dissolve
  13. a grown-up
  14. True
  15. a battery cell
  16. a spoon
  17. False
  18. a mirror
  19. False
  20. False
  21. food colour
  22. sugar crystals form
  23. not needed
  24. chalk powder
  25. dissolves in water
  26. False
  27. glucose powder
  28. False
  29. water evaporates
  30. salt
  31. needed
  32. a balloon
  33. safe from small children
  34. to make it very salty
  35. cannot be undone
  36. True
  37. True
  38. False
  39. a magnet
  40. bigger crystals

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