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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 70 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) salt (d) a mirror
  2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
  3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
  4. 4.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) folding paper (c) melting butter (d) freezing water
  5. 5.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
  6. 6.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
  7. 7.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) baking a cake (d) freezing water
  8. 8.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) table salt (d) sugar
  9. 9.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
  10. 10.True or false: sugar does not dissolve in water. (a) True (b) False
  11. 11.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
  12. 12.True or false: rusting iron is a change that can be undone. (a) True (b) False
  13. 13.🛟 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
  14. 14.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
  15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
  16. 16.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) cooking an egg (d) milk turning to curd
  17. 17.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
  18. 18.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
  19. 19.🧂 Which of these does not dissolve in water? (a) cooking oil (b) baking soda (c) table salt (d) sugar
  20. 20.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
  21. 21.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sugar (d) cooking oil
  22. 22.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
  23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) yeast (d) warm water
  24. 24.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  25. 25.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
  26. 26.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
  27. 27.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  28. 28.🔍 Which is the odd one out? (a) sand (b) food colour (c) sugar (d) table salt
  29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
  30. 30.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
  31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) days to see crystals (c) sunny or shady place
  32. 32.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
  33. 33.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
  34. 34.⚖️ 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 change it (b) we measure it (c) we keep it the same
  35. 35.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  36. 36.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
  37. 37.True or false: salt is needed for growing salt crystals. (a) True (b) False
  38. 38.⚖️ 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) False (b) True
  39. 39.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sugar (d) small pebbles
  40. 40.True or false: glucose powder does not dissolve in water. (a) True (b) False

Answer key

  1. a mirror
  2. bigger crystals
  3. a grown-up
  4. cooking an egg
  5. can be undone
  6. can be undone
  7. baking a cake
  8. small pebbles
  9. saturated
  10. False
  11. dissolves in water
  12. False
  13. safe from small children
  14. False
  15. False
  16. melting ice
  17. water evaporates
  18. needed
  19. cooking oil
  20. does not dissolve
  21. sugar
  22. few or no crystals
  23. yeast
  24. True
  25. not needed
  26. tiny cubes
  27. not needed
  28. sand
  29. False
  30. not needed
  31. the kind of salt
  32. does not dissolve
  33. True
  34. we keep it the same
  35. not needed
  36. False
  37. True
  38. True
  39. small pebbles
  40. False

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