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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 541 · 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) freezing water (b) dissolving salt (c) cooking an egg (d) melting butter
  2. 2.🔮 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
  3. 3.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
  4. 4.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
  5. 5.True or false: table salt dissolves in water. (a) False (b) True
  6. 6.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
  7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) sunny or shady place (d) the same dish
  8. 8.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
  9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
  10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a piece of string (d) a balloon
  11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
  12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
  13. 13.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
  14. 14.True or false: cooking oil dissolves in water. (a) True (b) False
  15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) a shallow dish (d) salt
  16. 16.True or false: sand does not dissolve in water. (a) True (b) False
  17. 17.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
  18. 18.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
  19. 19.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
  20. 20.True or false: glucose powder does not dissolve in water. (a) True (b) False
  21. 21.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
  22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
  23. 23.⚖️ 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 keep it the same (b) we change it (c) we measure it
  24. 24.True or false: melting butter is a change that cannot be undone. (a) True (b) False
  25. 25.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
  26. 26.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) freezing water (d) browning lemon ink
  27. 27.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) sawdust (d) sand
  28. 28.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a piece of string (c) a magnet (d) a battery cell
  29. 29.🔍 Which is the odd one out? (a) sand (b) sugar (c) food colour (d) baking soda
  30. 30.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
  31. 31.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
  32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) a piece of string (d) warm water
  33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a battery cell (c) a piece of string (d) a shallow dish
  34. 34.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
  35. 35.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
  36. 36.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a spoon (d) a balloon
  37. 37.True or false: rusting iron is a change that can be undone. (a) False (b) True
  38. 38.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
  39. 39.🧂 Which of these dissolves in water? (a) sugar (b) sawdust (c) sand (d) chalk powder
  40. 40.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) table salt (d) cooking oil

Answer key

  1. cooking an egg
  2. sugar crystals form
  3. needed
  4. not needed
  5. True
  6. does not dissolve
  7. days to see crystals
  8. can be undone
  9. True
  10. a balloon
  11. few or no crystals
  12. a grown-up
  13. dissolves in water
  14. False
  15. a balloon
  16. True
  17. not needed
  18. False
  19. safe from small children
  20. False
  21. False
  22. False
  23. we keep it the same
  24. False
  25. tiny cubes
  26. freezing water
  27. baking soda
  28. a piece of string
  29. sand
  30. not needed
  31. can be undone
  32. a mirror
  33. a battery cell
  34. needed
  35. bigger crystals
  36. a spoon
  37. False
  38. cannot be undone
  39. sugar
  40. cooking oil

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