Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 661 · 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 shallow dish is needed for growing salt crystals. (a) False (b) True
2. 2.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
3. 3.⚖️ 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) days to see crystals (c) sunny or shady place (d) the amount of water
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) turmeric powder
5. 5.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a magnet (d) warm water
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a shallow dish (d) a magnet
8. 8.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) yeast (d) warm water
10. 10.⚖️ 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 change it (c) we keep it the same
11. 11.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) table salt (d) cooking oil
12. 12.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
13. 13.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
14. 14.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) cooking oil (d) glucose powder
15. 15.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
16. 16.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
17. 17.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) chalk powder (d) baking soda
18. 18.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) folding paper (d) dissolving salt
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) a battery cell
20. 20.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) browning lemon ink (d) cooking an egg
21. 21.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) food colour (d) sawdust
23. 23.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🔍 Which is the odd one out? (a) table salt (b) sugar (c) food colour (d) sand
25. 25.True or false: baking soda does not dissolve in water. (a) False (b) True
26. 26.True or false: chalk powder dissolves in water. (a) False (b) True
27. 27.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) table salt (d) chalk powder
28. 28.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) warm water (c) salt (d) a spoon
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a balloon
32. 32.🧂 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 very salty (d) to make it fizz
33. 33.⚖️ 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
34. 34.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
35. 35.True or false: sand does not dissolve in water. (a) True (b) False
36. 36.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
37. 37.⚖️ 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 water (c) the kind of salt (d) the amount of salt
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
39. 39.⚖️ 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
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a piece of string (d) a shallow dish

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