Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 584 · 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.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.⚖️ 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 keep it the same (c) we change it
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
4. 4.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) melting ice (d) browning lemon ink
5. 5.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) cooking an egg (d) melting ice
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
7. 7.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
8. 8.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) sugar (d) cooking oil
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a shallow dish (d) a battery cell
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
12. 12.True or false: rusting iron is a change that can be undone. (a) False (b) True
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 salt”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
15. 15.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
16. 16.True or false: melting ice is a change that cannot be undone. (a) False (b) True
17. 17.True or false: baking a cake is a change that can be undone. (a) False (b) True
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the kind of salt (c) days to see crystals
20. 20.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
21. 21.True or false: table salt dissolves in water. (a) True (b) False
22. 22.🧂 Which of these dissolves in water? (a) food colour (b) chalk powder (c) sand (d) sawdust
23. 23.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) sawdust (d) sugar
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a spoon (d) a balloon
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) salt (d) a battery cell
26. 26.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) dissolving salt (c) milk turning to curd (d) baking a cake
27. 27.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
28. 28.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a balloon (d) a piece of string
30. 30.🧂 Which of these does not dissolve in water? (a) food colour (b) sawdust (c) table salt (d) sugar
31. 31.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) salt (d) a magnet
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 change it (b) we measure it (c) we keep it the same
33. 33.🧺 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
34. 34.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
35. 35.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
36. 36.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
37. 37.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
38. 38.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
39. 39.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a mirror (d) warm water

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