Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 752 · 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.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
2. 2.⚖️ 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) True (b) False
3. 3.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) the amount of salt (d) the kind of salt
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.True or false: freezing water is a change that cannot be undone. (a) True (b) False
8. 8.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sugar (d) chalk powder
10. 10.True or false: food colour dissolves in water. (a) True (b) False
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.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
13. 13.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sawdust (d) baking soda
14. 14.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) melting butter (d) dissolving salt
15. 15.⚖️ 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) the kind of salt (b) sunny or shady place (c) the amount of salt (d) the same dish
16. 16.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) warm water (d) salt
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 what we measure. (a) False (b) True
19. 19.⚖️ 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) True (b) False
20. 20.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
21. 21.⚖️ 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 amount of water (c) days to see crystals
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.True or false: sawdust dissolves in water. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) food colour (d) cooking oil
25. 25.True or false: yeast is needed for growing salt crystals. (a) False (b) True
26. 26.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
27. 27.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) a magnet
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a mirror (d) warm water
33. 33.True or false: freezing water is a change that can be undone. (a) True (b) False
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
36. 36.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
37. 37.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) glucose powder (d) baking soda
39. 39.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) melting butter
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) a shallow dish (d) salt

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