Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 467 · 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.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
3. 3.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) milk turning to curd (d) browning lemon ink
4. 4.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a spoon (c) turmeric powder (d) a mirror
5. 5.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a piece of string (d) a mirror
6. 6.True or false: small pebbles dissolves in water. (a) True (b) False
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a shallow dish (c) warm water (d) salt
9. 9.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a magnet (d) salt
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the same dish (b) the amount of salt (c) days to see crystals (d) the amount of water
14. 14.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
16. 16.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
17. 17.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
18. 18.⚖️ 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 measure it (c) we change it
19. 19.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
20. 20.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) sawdust (d) food colour
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) a spoon (d) a piece of string
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
24. 24.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) cooking an egg (d) freezing water
25. 25.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.True or false: sugar dissolves in water. (a) False (b) True
27. 27.True or false: warm water is needed for growing salt crystals. (a) True (b) False
28. 28.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) rusting iron (d) melting butter
29. 29.⚖️ 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
30. 30.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) glucose powder (d) sugar
31. 31.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
32. 32.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
33. 33.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
34. 34.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
35. 35.True or false: cooking oil does not dissolve in water. (a) True (b) False
36. 36.🧂 Which of these dissolves in water? (a) sugar (b) sand (c) cooking oil (d) sawdust
37. 37.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
39. 39.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a mirror (d) a shallow dish

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