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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 653 · 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 “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
  2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
  3. 3.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  4. 4.True or false: cooking an egg is a change that can be undone. (a) True (b) False
  5. 5.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
  6. 6.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
  7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) warm water (d) a spoon
  8. 8.🔮 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
  9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  10. 10.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
  11. 11.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
  12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
  13. 13.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sawdust (d) baking soda
  14. 14.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
  15. 15.🧂 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
  16. 16.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) sand (d) food colour
  17. 17.True or false: melting ice is a change that can be undone. (a) False (b) True
  18. 18.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) sugar (d) chalk powder
  19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) turmeric powder (c) a piece of string (d) a spoon
  20. 20.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
  21. 21.True or false: sand dissolves in water. (a) True (b) False
  22. 22.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a mirror (d) salt
  23. 23.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sawdust (d) food colour
  24. 24.True or false: table salt does not dissolve in water. (a) True (b) False
  25. 25.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
  26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
  27. 27.True or false: cooking oil dissolves in water. (a) True (b) False
  28. 28.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) small pebbles (d) sugar
  29. 29.True or false: melting butter is a change that cannot be undone. (a) False (b) True
  30. 30.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) the dish melts (d) salt grows roots
  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.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
  33. 33.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) fish make it (d) sea water evaporates
  34. 34.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) glucose powder (d) small pebbles
  35. 35.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
  36. 36.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) sand (d) sawdust
  37. 37.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) cooking oil (d) baking soda
  38. 38.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
  39. 39.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
  40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True

Answer key

  1. we keep it the same
  2. tiny cubes
  3. needed
  4. False
  5. can be undone
  6. False
  7. a balloon
  8. few or no crystals
  9. not needed
  10. False
  11. False
  12. False
  13. baking soda
  14. True
  15. to make it very salty
  16. sand
  17. True
  18. sugar
  19. turmeric powder
  20. True
  21. False
  22. salt
  23. food colour
  24. False
  25. sugar crystals form
  26. we keep it the same
  27. False
  28. sugar
  29. False
  30. water evaporates
  31. False
  32. a grown-up
  33. sea water evaporates
  34. glucose powder
  35. True
  36. glucose powder
  37. cooking oil
  38. False
  39. safe from small children
  40. False

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