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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 399 · 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.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
  2. 2.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
  3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of salt
  4. 4.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) table salt (d) small pebbles
  5. 5.True or false: baking soda dissolves in water. (a) False (b) True
  6. 6.True or false: melting butter is a change that can be undone. (a) True (b) False
  7. 7.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sawdust (d) glucose powder
  8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
  9. 9.True or false: salt is needed for growing salt crystals. (a) True (b) False
  10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
  11. 11.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) table salt (d) sawdust
  12. 12.True or false: table salt dissolves in water. (a) False (b) True
  13. 13.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a mirror (d) salt
  14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a mirror (d) warm water
  15. 15.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
  16. 16.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
  17. 17.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
  18. 18.True or false: sand dissolves in water. (a) True (b) False
  19. 19.True or false: food colour dissolves in water. (a) False (b) True
  20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
  21. 21.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) warm water (c) a shallow dish (d) a spoon
  22. 22.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a balloon (d) a piece of string
  23. 23.True or false: salt is not needed for growing salt crystals. (a) True (b) False
  24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
  25. 25.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sand (d) sugar
  26. 26.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
  27. 27.True or false: cooking oil does not dissolve in water. (a) False (b) True
  28. 28.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
  29. 29.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
  30. 30.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
  31. 31.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) a shallow dish (d) a piece of string
  32. 32.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the kind of salt
  34. 34.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
  35. 35.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
  36. 36.⚖️ 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 change it (c) we keep it the same
  37. 37.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  38. 38.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting butter (c) milk turning to curd (d) browning lemon ink
  39. 39.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
  40. 40.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) a piece of string (d) a magnet

Answer key

  1. sea water evaporates
  2. cannot be undone
  3. the amount of salt
  4. small pebbles
  5. True
  6. True
  7. sawdust
  8. a grown-up
  9. True
  10. the amount of water
  11. sawdust
  12. True
  13. salt
  14. a mirror
  15. tiny cubes
  16. few or no crystals
  17. not needed
  18. False
  19. True
  20. True
  21. turmeric powder
  22. a balloon
  23. False
  24. bigger crystals
  25. sand
  26. needed
  27. True
  28. True
  29. True
  30. can be undone
  31. yeast
  32. cannot be undone
  33. the kind of salt
  34. can be undone
  35. True
  36. we keep it the same
  37. can be undone
  38. melting butter
  39. does not dissolve
  40. a piece of string

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