Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 524 · 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.🔮 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
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) turmeric powder
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) a magnet (d) salt
6. 6.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
7. 7.🔍 Which is the odd one out? (a) sugar (b) table salt (c) baking soda (d) small pebbles
8. 8.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) sand (d) table salt
9. 9.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
10. 10.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
11. 11.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting ice (d) baking a cake
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
13. 13.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
14. 14.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
15. 15.🧂 Which of these does not dissolve in water? (a) sawdust (b) baking soda (c) sugar (d) glucose powder
16. 16.⚖️ 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) False (b) True
17. 17.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.⚖️ 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) False (b) True
20. 20.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) sawdust (d) food colour
21. 21.⚖️ 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 kind of salt (b) the amount of water (c) sunny or shady place (d) the amount of salt
22. 22.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
24. 24.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to make it fizz (d) to change its colour
25. 25.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
26. 26.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a mirror (d) a piece of string
28. 28.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
29. 29.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) cooking an egg (d) melting ice
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a battery cell (d) salt
31. 31.True or false: sand dissolves in water. (a) True (b) False
32. 32.⚖️ 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
33. 33.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
34. 34.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
35. 35.⚖️ 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
36. 36.🧈 Which of these is a change that can be undone? (a) baking a cake (b) dissolving salt (c) milk turning to curd (d) cooking an egg
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) turmeric powder (c) salt (d) warm water
38. 38.🧈 Which of these is a change that can be undone? (a) melting ice (b) browning lemon ink (c) milk turning to curd (d) baking a cake
39. 39.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) melting ice (d) freezing water
40. 40.True or false: sawdust does not dissolve in water. (a) True (b) False

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