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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 492 · 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.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting ice (c) freezing water (d) folding paper
  2. 2.True or false: table salt dissolves in water. (a) True (b) False
  3. 3.True or false: melting butter is a change that cannot be undone. (a) False (b) True
  4. 4.🧂 Which of these dissolves in water? (a) cooking oil (b) sugar (c) chalk powder (d) small pebbles
  5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
  6. 6.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) salt (d) a battery cell
  7. 7.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
  8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
  9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
  10. 10.⚖️ 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 keep it the same (c) we measure it
  11. 11.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  12. 12.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
  13. 13.True or false: baking soda dissolves in water. (a) True (b) False
  14. 14.🧈 Which of these is a change that can be undone? (a) melting butter (b) cooking an egg (c) baking a cake (d) browning lemon ink
  15. 15.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
  16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) salt (d) warm water
  17. 17.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting butter (c) melting ice (d) dissolving salt
  18. 18.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
  19. 19.True or false: baking soda does not dissolve in water. (a) True (b) False
  20. 20.True or false: rusting iron is a change that can be undone. (a) True (b) False
  21. 21.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) baking soda (d) sand
  22. 22.True or false: chalk powder dissolves in water. (a) True (b) False
  23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) warm water (d) a piece of string
  24. 24.True or false: cooking oil does not dissolve in water. (a) False (b) True
  25. 25.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
  26. 26.🔮 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
  27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) salt (d) turmeric powder
  28. 28.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  29. 29.True or false: cooking an egg is a change that can be undone. (a) True (b) False
  30. 30.True or false: sand does not dissolve in water. (a) True (b) False
  31. 31.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) browning lemon ink (d) milk turning to curd
  32. 32.True or false: salt is needed for growing salt crystals. (a) True (b) False
  33. 33.True or false: salt is not needed for growing salt crystals. (a) False (b) True
  34. 34.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
  35. 35.🛟 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
  36. 36.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) warm water (c) a shallow dish (d) a piece of string
  37. 37.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
  38. 38.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) rusting iron (d) browning lemon ink
  39. 39.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
  40. 40.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) melting ice (d) cooking an egg

Answer key

  1. cooking an egg
  2. True
  3. False
  4. sugar
  5. bigger crystals
  6. salt
  7. not needed
  8. a grown-up
  9. few or no crystals
  10. we keep it the same
  11. needed
  12. False
  13. True
  14. melting butter
  15. dissolves in water
  16. a mirror
  17. rusting iron
  18. tiny cubes
  19. False
  20. False
  21. sand
  22. False
  23. yeast
  24. True
  25. True
  26. sugar crystals form
  27. turmeric powder
  28. not needed
  29. False
  30. True
  31. folding paper
  32. True
  33. False
  34. dissolves in water
  35. safe from small children
  36. a mirror
  37. False
  38. freezing water
  39. can be undone
  40. melting ice

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