Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 367 · 40 questions

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.

1. 1.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
2. 2.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
3. 3.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) cooking oil (d) baking soda
4. 4.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a shallow dish (d) a battery cell
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
7. 7.True or false: salt is needed for growing salt crystals. (a) False (b) True
8. 8.⚖️ 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
9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
12. 12.🔍 Which is the odd one out? (a) table salt (b) sugar (c) sand (d) food colour
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
14. 14.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) small pebbles (d) chalk powder
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) warm water (d) salt
16. 16.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a battery cell (d) a shallow dish
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) a spoon (d) warm water
18. 18.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
19. 19.⚖️ 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
20. 20.⚖️ 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) the same dish (c) days to see crystals
21. 21.🧂 Which of these dissolves in water? (a) table salt (b) small pebbles (c) cooking oil (d) sand
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a balloon (d) yeast
23. 23.🔍 Which is the odd one out? (a) food colour (b) sugar (c) small pebbles (d) table salt
24. 24.⚖️ 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 keep it the same (b) we change it (c) we measure it
25. 25.⚖️ 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
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.⚖️ 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) the kind of salt (c) days to see crystals (d) sunny or shady place
28. 28.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) chalk powder (d) sugar
29. 29.True or false: cooking oil does not dissolve in water. (a) False (b) True
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
31. 31.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a magnet (d) a spoon
33. 33.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) sawdust (d) food colour
34. 34.True or false: cooking an egg is a change that can be undone. (a) True (b) False
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) yeast (d) salt
36. 36.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
37. 37.⚖️ 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 water
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.True or false: melting ice is a change that cannot be undone. (a) False (b) True
40. 40.True or false: freezing water is a change that can be undone. (a) False (b) True

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