Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 902 · 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.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
3. 3.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) freezing water (d) browning lemon ink
4. 4.True or false: freezing water is a change that cannot be undone. (a) True (b) False
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) turmeric powder (d) warm water
6. 6.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
7. 7.True or false: baking soda dissolves in water. (a) True (b) False
8. 8.⚖️ 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) days to see crystals (c) the kind of salt (d) the amount of salt
9. 9.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) a balloon (d) a spoon
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
12. 12.⚖️ 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 same dish
13. 13.True or false: baking a cake is a change that can be undone. (a) False (b) True
14. 14.True or false: sawdust does not dissolve in water. (a) True (b) False
15. 15.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.⚖️ 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 keep it the same (b) we change it (c) we measure it
17. 17.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) rusting iron (d) browning lemon ink
18. 18.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
19. 19.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
20. 20.True or false: sand does not dissolve in water. (a) True (b) False
21. 21.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
22. 22.⚖️ 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
23. 23.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
24. 24.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
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 the one thing we change. (a) True (b) False
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a magnet
27. 27.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) melting ice (d) milk turning to curd
29. 29.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a magnet (d) a piece of string
31. 31.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) a piece of string (d) a spoon
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 balloon (d) warm water
34. 34.⚖️ 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 amount of salt (b) days to see crystals (c) the kind of salt (d) sunny or shady place
35. 35.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
36. 36.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
37. 37.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
38. 38.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
39. 39.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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