Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 51 · 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.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) the dish melts (d) salt grows roots
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) turmeric powder (d) salt
3. 3.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
4. 4.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
5. 5.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) melting ice (d) rusting iron
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) the amount of salt (d) days to see crystals
7. 7.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) table salt (d) sawdust
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) yeast (d) a piece of string
10. 10.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) turmeric powder
13. 13.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.⚖️ 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
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
16. 16.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
18. 18.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a shallow dish (c) a mirror (d) a battery cell
19. 19.⚖️ 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
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
22. 22.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) chalk powder (d) food colour
23. 23.True or false: salt is needed for growing salt crystals. (a) False (b) True
24. 24.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
25. 25.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
26. 26.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) food colour (d) sugar
27. 27.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a balloon (d) a piece of string
29. 29.True or false: chalk powder does not dissolve in water. (a) True (b) False
30. 30.True or false: rusting iron is a change that can be undone. (a) False (b) True
31. 31.True or false: sand does not dissolve in water. (a) True (b) False
32. 32.⚖️ 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
33. 33.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
34. 34.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) browning lemon ink (d) freezing water
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
36. 36.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
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) sunny or shady place (b) days to see crystals (c) the amount of water
38. 38.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
39. 39.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a spoon (c) salt (d) a piece of string

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