Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 120 · 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) sugar (b) sawdust (c) chalk powder (d) small pebbles
2. 2.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
3. 3.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
8. 8.True or false: baking soda dissolves in water. (a) False (b) True
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a magnet (d) a spoon
10. 10.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
12. 12.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
14. 14.True or false: warm water is needed for growing salt crystals. (a) False (b) True
15. 15.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) dissolving salt (d) cooking an egg
16. 16.⚖️ 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
17. 17.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
18. 18.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🔍 Which is the odd one out? (a) table salt (b) small pebbles (c) cooking oil (d) chalk powder
20. 20.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
21. 21.🧂 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
22. 22.⚖️ 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) days to see crystals (b) the amount of water (c) the amount of salt (d) sunny or shady place
23. 23.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sugar (d) sand
24. 24.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) milk turning to curd (d) melting butter
25. 25.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) baking soda (d) glucose powder
27. 27.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) freezing water (d) melting butter
29. 29.⚖️ 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
30. 30.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
31. 31.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) table salt (d) sawdust
32. 32.True or false: glucose powder does not dissolve in water. (a) True (b) False
33. 33.True or false: chalk powder dissolves in water. (a) True (b) False
34. 34.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a shallow dish (d) turmeric powder
36. 36.🔮 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
37. 37.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
38. 38.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.True or false: small pebbles does not dissolve in water. (a) False (b) True
40. 40.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) dissolving salt (d) melting butter

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