Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 864 · 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.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
2. 2.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) folding paper (d) melting butter
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a mirror (d) a piece of string
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 water”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
7. 7.True or false: salt is not needed for growing salt crystals. (a) False (b) True
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a mirror (d) yeast
9. 9.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
10. 10.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a balloon (d) warm water
12. 12.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
13. 13.⚖️ 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 change it (c) we measure it
14. 14.🧂 Which of these dissolves in water? (a) table salt (b) sawdust (c) cooking oil (d) chalk powder
15. 15.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
16. 16.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a magnet (d) a piece of string
19. 19.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
20. 20.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) table salt (d) sugar
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
23. 23.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) folding paper (d) browning lemon ink
24. 24.True or false: salt is needed for growing salt crystals. (a) False (b) True
25. 25.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
26. 26.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) glucose powder (d) cooking oil
28. 28.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
29. 29.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
30. 30.⚖️ 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 measure it (c) we keep it the same
31. 31.True or false: glucose powder does not dissolve in water. (a) False (b) True
32. 32.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a balloon (d) warm water
33. 33.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) sand (d) food colour
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
35. 35.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) baking a cake (d) melting ice
36. 36.True or false: freezing water is a change that cannot be undone. (a) False (b) True
37. 37.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a battery cell (d) salt
38. 38.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
39. 39.True or false: cooking oil does not dissolve in water. (a) False (b) True
40. 40.True or false: baking soda does not dissolve in water. (a) False (b) True

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