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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 448 · 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? What do we do with “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
  2. 2.⚖️ 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
  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.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) sawdust (d) sand
  5. 5.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  6. 6.🛟 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
  7. 7.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  8. 8.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
  9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
  11. 11.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) folding paper (d) cooking an egg
  12. 12.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
  13. 13.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
  14. 14.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
  15. 15.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
  16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a magnet (d) a shallow dish
  17. 17.True or false: baking a cake is a change that can be undone. (a) True (b) False
  18. 18.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) freezing water (d) browning lemon ink
  19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
  20. 20.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
  21. 21.🧂 Which of these dissolves in water? (a) sugar (b) cooking oil (c) sawdust (d) sand
  22. 22.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to make it fizz (d) to cool the water
  23. 23.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
  24. 24.True or false: sand does not dissolve in water. (a) True (b) False
  25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a mirror
  26. 26.True or false: food colour does not dissolve in water. (a) True (b) False
  27. 27.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a piece of string (c) salt (d) warm water
  28. 28.🔍 Which is the odd one out? (a) food colour (b) sugar (c) sawdust (d) glucose powder
  29. 29.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
  30. 30.True or false: freezing water is a change that can be undone. (a) False (b) True
  31. 31.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  32. 32.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) sawdust (d) cooking oil
  33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
  34. 34.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  35. 35.True or false: table salt does not dissolve in water. (a) True (b) False
  36. 36.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
  37. 37.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
  38. 38.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) cooking an egg (d) rusting iron
  39. 39.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
  40. 40.🔍 Which is the odd one out? (a) baking soda (b) sand (c) sugar (d) table salt

Answer key

  1. we measure it
  2. True
  3. water evaporates
  4. baking soda
  5. not needed
  6. a grown-up
  7. needed
  8. False
  9. not needed
  10. bigger crystals
  11. cooking an egg
  12. saturated
  13. cannot be undone
  14. can be undone
  15. can be undone
  16. a magnet
  17. False
  18. browning lemon ink
  19. we keep it the same
  20. True
  21. sugar
  22. to make it very salty
  23. safe from small children
  24. True
  25. a mirror
  26. False
  27. yeast
  28. sawdust
  29. cannot be undone
  30. True
  31. dissolves in water
  32. food colour
  33. we change it
  34. needed
  35. False
  36. tiny cubes
  37. dissolves in water
  38. freezing water
  39. few or no crystals
  40. sand

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