Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 621 · 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 shallow dish for growing salt crystals? (a) not needed (b) needed
2. 2.🔍 Which is the odd one out? (a) food colour (b) sugar (c) chalk powder (d) table salt
3. 3.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) cooking an egg (d) melting butter
4. 4.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
5. 5.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
6. 6.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.True or false: yeast is needed for growing salt crystals. (a) False (b) True
8. 8.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
10. 10.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.True or false: salt is not needed for growing salt crystals. (a) False (b) True
12. 12.🧺 Do we need a magnet 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? True or false: the amount of salt is kept the same. (a) False (b) True
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
15. 15.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
16. 16.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
17. 17.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to change its colour (d) to cool the water
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) a shallow dish (d) warm water
19. 19.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) glucose powder
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a piece of string (d) a mirror
21. 21.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
22. 22.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) baking soda (d) chalk powder
24. 24.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
25. 25.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) cooking oil
26. 26.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) freezing water (d) baking a cake
27. 27.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sugar (d) cooking oil
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) turmeric powder (d) a shallow dish
32. 32.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
33. 33.⚖️ 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
34. 34.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
35. 35.True or false: small pebbles does not dissolve in water. (a) False (b) True
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) turmeric powder (c) warm water (d) a piece of string
37. 37.⚖️ 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) False (b) True
38. 38.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
39. 39.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ 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) days to see crystals (c) the amount of water

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