Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 808 · 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: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
4. 4.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) milk turning to curd (c) rusting iron (d) baking a cake
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a mirror (d) a piece of string
6. 6.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
7. 7.⚖️ 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 keep it the same (b) we change it (c) we measure it
8. 8.True or false: small pebbles does not dissolve in water. (a) False (b) True
9. 9.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
10. 10.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
11. 11.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) browning lemon ink (d) freezing water
12. 12.⚖️ 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) True (b) False
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
14. 14.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) cooking oil (d) food colour
15. 15.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a spoon (d) turmeric powder
17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
18. 18.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) warm water (d) yeast
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) warm water (c) salt (d) a piece of string
21. 21.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
22. 22.True or false: freezing water is a change that cannot be undone. (a) True (b) False
23. 23.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) sawdust (d) glucose powder
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a piece of string (d) a shallow dish
25. 25.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
26. 26.True or false: cooking oil does not dissolve in water. (a) False (b) True
27. 27.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
28. 28.🔍 Which is the odd one out? (a) sand (b) food colour (c) baking soda (d) glucose powder
29. 29.⚖️ 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
30. 30.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
31. 31.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
32. 32.⚖️ 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 kind of salt (c) the amount of water (d) days to see crystals
33. 33.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
34. 34.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) folding paper (d) baking a cake
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) warm water (d) yeast
36. 36.True or false: yeast is needed for growing salt crystals. (a) True (b) False
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
38. 38.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
39. 39.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) baking soda (d) sawdust
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) turmeric powder (d) salt

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