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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 148 · 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.🛟 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
  2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
  3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
  4. 4.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
  5. 5.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
  6. 6.True or false: freezing water is a change that can be undone. (a) False (b) True
  7. 7.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) freezing water (d) baking a cake
  8. 8.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) table salt (d) chalk powder
  9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) yeast (d) warm water
  10. 10.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  11. 11.🔍 Which is the odd one out? (a) sawdust (b) sand (c) sugar (d) small pebbles
  12. 12.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
  13. 13.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) food colour (d) sand
  14. 14.True or false: rusting iron is a change that can be undone. (a) True (b) False
  15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a battery cell (d) warm water
  16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
  17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a spoon (d) a balloon
  18. 18.⚖️ 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 water (b) days to see crystals (c) sunny or shady place (d) the amount of salt
  19. 19.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
  20. 20.True or false: baking soda dissolves in water. (a) True (b) False
  21. 21.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
  22. 22.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) table salt (d) sand
  23. 23.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
  24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) a shallow dish (d) salt
  25. 25.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
  26. 26.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
  27. 27.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) rusting iron (d) folding paper
  28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a magnet (d) salt
  29. 29.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) folding paper (c) melting ice (d) freezing water
  30. 30.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) warm water (d) a battery cell
  31. 31.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
  32. 32.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sugar (d) food colour
  33. 33.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
  34. 34.🔍 Which is the odd one out? (a) small pebbles (b) food colour (c) sand (d) chalk powder
  35. 35.⚖️ 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 measure it (b) we change it (c) we keep it the same
  36. 36.⚖️ 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 change it (b) we keep it the same (c) we measure it
  37. 37.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
  38. 38.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) salt (c) a magnet (d) a mirror
  39. 39.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
  40. 40.True or false: table salt does not dissolve in water. (a) True (b) False

Answer key

  1. a grown-up
  2. tiny cubes
  3. bigger crystals
  4. can be undone
  5. not needed
  6. True
  7. freezing water
  8. table salt
  9. yeast
  10. needed
  11. sugar
  12. dissolves in water
  13. food colour
  14. False
  15. a battery cell
  16. not needed
  17. a balloon
  18. sunny or shady place
  19. cannot be undone
  20. True
  21. False
  22. sand
  23. sugar crystals form
  24. turmeric powder
  25. False
  26. False
  27. rusting iron
  28. a magnet
  29. cooking an egg
  30. warm water
  31. can be undone
  32. cooking oil
  33. water evaporates
  34. food colour
  35. we keep it the same
  36. we measure it
  37. can be undone
  38. salt
  39. does not dissolve
  40. False

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