Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 145 · 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: cooking an egg is a change that cannot be undone. (a) False (b) True
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) yeast (d) salt
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.⚖️ 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
7. 7.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) salt (d) a balloon
8. 8.🧂 Which of these dissolves in water? (a) sawdust (b) table salt (c) small pebbles (d) sand
9. 9.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.⚖️ 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) True (b) False
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) baking a cake (d) rusting iron
15. 15.⚖️ 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) days to see crystals (d) the amount of salt
16. 16.🧂 Which of these dissolves in water? (a) chalk powder (b) baking soda (c) sand (d) cooking oil
17. 17.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
19. 19.True or false: warm water is needed for growing salt crystals. (a) True (b) False
20. 20.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
21. 21.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
22. 22.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
23. 23.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
26. 26.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) melting ice (d) cooking an egg
27. 27.🔍 Which is the odd one out? (a) table salt (b) small pebbles (c) chalk powder (d) sand
28. 28.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
29. 29.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
30. 30.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
31. 31.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
32. 32.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
33. 33.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
34. 34.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
35. 35.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) turmeric powder (d) a magnet
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) a spoon (d) a balloon
38. 38.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
39. 39.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) dissolving salt (d) melting ice
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a magnet (d) salt

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