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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 975 · 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.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
  2. 2.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
  3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
  4. 4.⚖️ 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 amount of water (b) sunny or shady place (c) days to see crystals
  5. 5.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
  6. 6.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) sand (d) sawdust
  7. 7.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) folding paper (d) cooking an egg
  8. 8.🧂 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
  9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
  10. 10.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
  11. 11.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  12. 12.🧈 Which of these is a change that can be undone? (a) folding paper (b) cooking an egg (c) browning lemon ink (d) rusting iron
  13. 13.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) salt (d) turmeric powder
  14. 14.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) table salt (d) chalk powder
  15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a spoon (d) yeast
  16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) a piece of string (d) salt
  17. 17.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
  18. 18.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
  19. 19.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
  20. 20.True or false: baking soda does not dissolve in water. (a) True (b) False
  21. 21.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a magnet (c) a balloon (d) a battery cell
  22. 22.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  23. 23.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) warm water (d) a battery cell
  25. 25.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
  26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) the same dish (c) the amount of water (d) sunny or shady place
  27. 27.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
  28. 28.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) salt (d) a battery cell
  29. 29.True or false: table salt does not dissolve in water. (a) False (b) True
  30. 30.True or false: sugar does not dissolve in water. (a) True (b) False
  31. 31.True or false: baking soda dissolves in water. (a) False (b) True
  32. 32.True or false: freezing water is a change that can be undone. (a) False (b) True
  33. 33.True or false: warm water is needed for growing salt crystals. (a) True (b) False
  34. 34.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
  35. 35.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
  36. 36.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
  37. 37.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
  38. 38.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
  39. 39.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
  40. 40.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars

Answer key

  1. safe from small children
  2. True
  3. we keep it the same
  4. the amount of water
  5. False
  6. baking soda
  7. cooking an egg
  8. to make it very salty
  9. True
  10. True
  11. not needed
  12. folding paper
  13. turmeric powder
  14. chalk powder
  15. yeast
  16. a magnet
  17. sea water evaporates
  18. can be undone
  19. needed
  20. False
  21. a spoon
  22. needed
  23. True
  24. a battery cell
  25. False
  26. sunny or shady place
  27. sugar crystals form
  28. salt
  29. False
  30. False
  31. True
  32. True
  33. True
  34. dissolves in water
  35. cannot be undone
  36. needed
  37. does not dissolve
  38. dissolves in water
  39. cannot be undone
  40. tiny cubes

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