Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 564 · 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.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) melting ice (d) rusting iron
2. 2.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
3. 3.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) cooking oil (d) small pebbles
4. 4.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
5. 5.⚖️ 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) days to see crystals (c) the kind of salt
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) a mirror (d) a magnet
7. 7.True or false: cooking oil dissolves in water. (a) True (b) False
8. 8.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
9. 9.⚖️ 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
10. 10.True or false: sugar does not dissolve in water. (a) False (b) True
11. 11.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
12. 12.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🔍 Which is the odd one out? (a) food colour (b) table salt (c) cooking oil (d) baking soda
14. 14.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a battery cell (d) warm water
16. 16.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
17. 17.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) glucose powder (d) chalk powder
18. 18.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) chalk powder (d) sawdust
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) a shallow dish (d) salt
20. 20.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) yeast (d) salt
22. 22.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
23. 23.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) cooking oil (d) food colour
24. 24.True or false: glucose powder dissolves in water. (a) True (b) False
25. 25.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
27. 27.True or false: melting ice is a change that can be undone. (a) True (b) False
28. 28.True or false: cooking oil does not dissolve in water. (a) False (b) True
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a piece of string (d) warm water
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
32. 32.⚖️ 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 salt (b) the same dish (c) days to see crystals (d) the kind of salt
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) turmeric powder (d) a spoon
34. 34.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
35. 35.⚖️ 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
36. 36.🛟 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
37. 37.True or false: folding paper is a change that cannot be undone. (a) False (b) True
38. 38.⚖️ 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
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
40. 40.True or false: warm water is needed for growing salt crystals. (a) False (b) True

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