Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 106 · 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 dissolves in water? (a) sand (b) cooking oil (c) chalk powder (d) table salt
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a balloon (d) salt
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
6. 6.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) warm water (d) a spoon
9. 9.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a spoon (d) a magnet
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a battery cell (d) a piece of string
12. 12.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) salt (d) a piece of string
14. 14.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
15. 15.⚖️ 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 measure it (b) we keep it the same (c) we change it
16. 16.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) days to see crystals (c) sunny or shady place
19. 19.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
20. 20.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) warm water (d) a spoon
22. 22.True or false: food colour dissolves in water. (a) False (b) True
23. 23.⚖️ 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) days to see crystals (c) the amount of salt (d) the amount of water
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
25. 25.🧈 Which of these is a change that can be undone? (a) baking a cake (b) dissolving salt (c) milk turning to curd (d) rusting iron
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) turmeric powder
27. 27.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
28. 28.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
29. 29.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) table salt (d) cooking oil
30. 30.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) food colour (d) glucose powder
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) sugar crystals form (d) it turns to butter
33. 33.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.🧈 Which of these is a change that can be undone? (a) folding paper (b) browning lemon ink (c) milk turning to curd (d) cooking an egg
35. 35.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) melting ice (d) baking a cake
36. 36.True or false: warm water is needed for growing salt crystals. (a) False (b) True
37. 37.🧂 Which of these does not dissolve in water? (a) food colour (b) chalk powder (c) sugar (d) table salt
38. 38.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a piece of string (d) a battery cell
40. 40.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) melting ice (d) cooking an egg

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