Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 633 · 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.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
2. 2.🧂 Which of these does not dissolve in water? (a) glucose powder (b) small pebbles (c) sugar (d) baking soda
3. 3.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
4. 4.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
6. 6.True or false: baking soda does not dissolve in water. (a) True (b) False
7. 7.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting ice (c) freezing water (d) melting butter
8. 8.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) baking soda (d) sawdust
9. 9.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) cooking oil (d) table salt
10. 10.⚖️ 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
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 keep it the same (b) we measure it (c) we change it
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
13. 13.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.True or false: melting ice is a change that can be undone. (a) False (b) True
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
17. 17.⚖️ 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
18. 18.⚖️ 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
19. 19.True or false: dissolving salt is a change that can be undone. (a) True (b) False
20. 20.True or false: salt is not needed for growing salt crystals. (a) False (b) True
21. 21.⚖️ 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
22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
23. 23.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) sand (d) sugar
24. 24.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a battery cell (d) salt
25. 25.⚖️ 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 keep it the same (c) we change it
26. 26.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
27. 27.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
28. 28.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) food colour (d) chalk powder
29. 29.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
30. 30.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
32. 32.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
34. 34.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
36. 36.True or false: sand dissolves in water. (a) False (b) True
37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
38. 38.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a mirror (d) a piece of string

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