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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 490 · 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 yeast for growing salt crystals? (a) not needed (b) needed
  2. 2.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) glucose powder (d) sugar
  3. 3.True or false: baking a cake is a change that can be undone. (a) True (b) False
  4. 4.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to change its colour (d) to cool the water
  5. 5.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) food colour (d) chalk powder
  6. 6.🔍 Which is the odd one out? (a) glucose powder (b) cooking oil (c) table salt (d) food colour
  7. 7.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
  8. 8.⚖️ 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 measure it (b) we keep it the same (c) we change it
  9. 9.True or false: sugar does not dissolve in water. (a) True (b) False
  10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
  11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
  12. 12.True or false: table salt does not dissolve in water. (a) True (b) False
  13. 13.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
  14. 14.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) melting ice (d) melting butter
  15. 15.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
  16. 16.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) baking a cake (d) melting butter
  17. 17.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  18. 18.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
  19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
  20. 20.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  21. 21.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
  22. 22.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
  23. 23.⚖️ 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
  24. 24.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) cooking oil (d) food colour
  25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
  26. 26.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) sand (d) food colour
  27. 27.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
  28. 28.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  29. 29.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
  30. 30.🧺 Do we need a piece of string 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? What do we do with “the same dish”? (a) we keep it the same (b) we measure it (c) we change it
  32. 32.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) melting butter (d) dissolving salt
  33. 33.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
  34. 34.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  35. 35.True or false: baking soda dissolves in water. (a) True (b) False
  36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) yeast (d) warm water
  37. 37.⚖️ 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 keep it the same (b) we measure it (c) we change it
  38. 38.True or false: baking soda does not dissolve in water. (a) False (b) True
  39. 39.True or false: small pebbles dissolves in water. (a) False (b) True
  40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) a shallow dish (d) warm water

Answer key

  1. not needed
  2. chalk powder
  3. False
  4. to make it very salty
  5. chalk powder
  6. cooking oil
  7. True
  8. we keep it the same
  9. False
  10. a grown-up
  11. few or no crystals
  12. False
  13. True
  14. baking a cake
  15. False
  16. melting butter
  17. not needed
  18. dissolves in water
  19. True
  20. True
  21. sugar crystals form
  22. False
  23. we measure it
  24. cooking oil
  25. False
  26. sand
  27. False
  28. cannot be undone
  29. needed
  30. needed
  31. we keep it the same
  32. cooking an egg
  33. safe from small children
  34. can be undone
  35. True
  36. yeast
  37. we keep it the same
  38. False
  39. False
  40. a mirror

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