Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 352 · 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.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
2. 2.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
4. 4.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
6. 6.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a piece of string (d) a spoon
8. 8.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
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.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
12. 12.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) food colour (d) sugar
13. 13.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
14. 14.⚖️ 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 keep it the same (c) we change it
15. 15.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
16. 16.True or false: chalk powder dissolves in water. (a) True (b) False
17. 17.True or false: sand dissolves in water. (a) False (b) True
18. 18.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
19. 19.⚖️ 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) sunny or shady place (b) the amount of salt (c) the same dish (d) the kind of salt
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) turmeric powder (d) a shallow dish
21. 21.True or false: sugar does not dissolve in water. (a) True (b) False
22. 22.⚖️ 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) the amount of salt (c) sunny or shady place
23. 23.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
24. 24.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
26. 26.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
28. 28.True or false: melting butter is a change that can be undone. (a) True (b) False
29. 29.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
30. 30.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.True or false: melting ice is a change that can be undone. (a) False (b) True
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) warm water
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a battery cell (d) turmeric powder
35. 35.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
36. 36.⚖️ 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 same dish
37. 37.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) folding paper (c) melting butter (d) melting ice
38. 38.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
40. 40.⚖️ 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

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