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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 434 · 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 is the odd one out? (a) food colour (b) sand (c) sugar (d) glucose powder
  2. 2.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
  3. 3.🧂 Which of these dissolves in water? (a) sugar (b) small pebbles (c) cooking oil (d) chalk powder
  4. 4.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) sand (d) small pebbles
  5. 5.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
  6. 6.True or false: table salt does not dissolve in water. (a) True (b) False
  7. 7.True or false: rusting iron is a change that can be undone. (a) False (b) True
  8. 8.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) melting ice (d) melting butter
  9. 9.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
  10. 10.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) food colour (d) sawdust
  11. 11.True or false: freezing water is a change that can be undone. (a) True (b) False
  12. 12.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) yeast (d) warm water
  13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
  14. 14.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
  15. 15.True or false: yeast is needed for growing salt crystals. (a) True (b) False
  16. 16.True or false: baking soda does not dissolve in water. (a) True (b) False
  17. 17.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
  18. 18.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
  19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) a piece of string (d) a shallow dish
  20. 20.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) turmeric powder (d) salt
  21. 21.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
  22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
  23. 23.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
  24. 24.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
  25. 25.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) baking a cake (d) melting ice
  26. 26.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
  27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
  28. 28.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) milk turning to curd (d) melting butter
  29. 29.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a spoon (c) a battery cell (d) turmeric powder
  30. 30.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
  31. 31.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
  32. 32.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
  33. 33.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  34. 34.⚖️ 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 keep it the same (b) we change it (c) we measure it
  35. 35.True or false: small pebbles dissolves in water. (a) False (b) True
  36. 36.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
  37. 37.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
  38. 38.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
  39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
  40. 40.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes

Answer key

  1. sand
  2. needed
  3. sugar
  4. baking soda
  5. safe from small children
  6. False
  7. False
  8. baking a cake
  9. True
  10. sawdust
  11. True
  12. yeast
  13. sugar crystals form
  14. not needed
  15. False
  16. False
  17. needed
  18. not needed
  19. a mirror
  20. salt
  21. dissolves in water
  22. True
  23. bigger crystals
  24. to make it very salty
  25. melting ice
  26. True
  27. False
  28. melting butter
  29. a spoon
  30. tiny cubes
  31. False
  32. dissolves in water
  33. cannot be undone
  34. we keep it the same
  35. False
  36. water evaporates
  37. can be undone
  38. False
  39. a grown-up
  40. few or no crystals

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