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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 640 · 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.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
  2. 2.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  3. 3.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a piece of string (d) a balloon
  4. 4.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
  5. 5.True or false: baking soda dissolves in water. (a) True (b) False
  6. 6.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) sugar (d) table salt
  7. 7.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) chalk powder (d) food colour
  8. 8.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) cooking oil (d) food colour
  9. 9.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
  10. 10.True or false: food colour does not dissolve in water. (a) True (b) False
  11. 11.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) dissolving salt (d) browning lemon ink
  12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
  13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) warm water (d) a spoon
  14. 14.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
  15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) yeast (c) a spoon (d) a shallow dish
  16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) warm water (d) a piece of string
  17. 17.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
  18. 18.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting ice (c) freezing water (d) folding paper
  19. 19.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  20. 20.True or false: salt is needed for growing salt crystals. (a) False (b) True
  21. 21.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
  22. 22.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  23. 23.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
  24. 24.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
  25. 25.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) turmeric powder (c) salt (d) a spoon
  26. 26.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
  27. 27.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  28. 28.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) cooking oil (d) table salt
  29. 29.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) chalk powder (d) sand
  30. 30.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) warm water (d) a magnet
  31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
  32. 32.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  33. 33.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) a mirror (d) a magnet
  34. 34.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a battery cell (d) turmeric powder
  35. 35.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
  36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
  37. 37.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sawdust (d) sugar
  40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

Answer key

  1. needed
  2. needed
  3. a piece of string
  4. cannot be undone
  5. True
  6. sawdust
  7. food colour
  8. food colour
  9. True
  10. False
  11. browning lemon ink
  12. bigger crystals
  13. turmeric powder
  14. dissolves in water
  15. yeast
  16. a battery cell
  17. to make it very salty
  18. rusting iron
  19. needed
  20. True
  21. safe from small children
  22. does not dissolve
  23. cannot be undone
  24. few or no crystals
  25. turmeric powder
  26. True
  27. cannot be undone
  28. table salt
  29. glucose powder
  30. a magnet
  31. False
  32. dissolves in water
  33. a shallow dish
  34. a spoon
  35. tiny cubes
  36. True
  37. can be undone
  38. False
  39. sawdust
  40. we change it

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