Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 923 · 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: milk turning to curd? (a) cannot be undone (b) can be undone
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
3. 3.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) warm water (d) turmeric powder
5. 5.⚖️ 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 kind of salt (c) sunny or shady place (d) days to see crystals
6. 6.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
7. 7.True or false: freezing water is a change that can be undone. (a) False (b) True
8. 8.⚖️ 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 measure it (b) we change it (c) we keep it the same
9. 9.True or false: glucose powder does not dissolve in water. (a) True (b) False
10. 10.⚖️ 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 kind of salt (b) days to see crystals (c) the amount of salt (d) sunny or shady place
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) chalk powder (d) cooking oil
13. 13.⚖️ 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 measure it (c) we change it
14. 14.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a balloon (d) yeast
17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
19. 19.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) yeast (c) a magnet (d) a balloon
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a magnet (d) a piece of string
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) turmeric powder (d) a spoon
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
24. 24.True or false: cooking oil dissolves in water. (a) True (b) False
25. 25.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
26. 26.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
27. 27.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) dissolving salt (d) rusting iron
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) rusting iron (c) melting ice (d) freezing water
29. 29.🧂 Which of these dissolves in water? (a) sugar (b) chalk powder (c) cooking oil (d) sawdust
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) warm water (d) a piece of string
31. 31.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.⚖️ 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
34. 34.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) sugar (d) small pebbles
35. 35.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
36. 36.True or false: small pebbles does not dissolve in water. (a) False (b) True
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) salt (d) a magnet
38. 38.True or false: melting ice is a change that can be undone. (a) False (b) True
39. 39.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
40. 40.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water

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