Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 209 · 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.🔍 Which is the odd one out? (a) sawdust (b) sand (c) chalk powder (d) table salt
2. 2.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
3. 3.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
4. 4.True or false: warm water is needed for growing salt crystals. (a) True (b) False
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
8. 8.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
9. 9.True or false: food colour dissolves in water. (a) False (b) True
10. 10.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
11. 11.True or false: salt is needed for growing salt crystals. (a) True (b) False
12. 12.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) freezing water (d) baking a cake
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) salt (d) turmeric powder
14. 14.⚖️ 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
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧂 Which of these dissolves in water? (a) glucose powder (b) sawdust (c) cooking oil (d) sand
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) salt (d) a balloon
19. 19.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) warm water (d) a mirror
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a magnet (d) salt
22. 22.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) folding paper (d) browning lemon ink
23. 23.True or false: table salt dissolves in water. (a) False (b) True
24. 24.⚖️ 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) True (b) False
25. 25.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
27. 27.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) sawdust (d) sand
28. 28.⚖️ 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 measure it (b) we change it (c) we keep it the same
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a piece of string (c) salt (d) warm water
30. 30.⚖️ 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 same dish (b) sunny or shady place (c) the amount of salt (d) the kind of salt
31. 31.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
33. 33.True or false: glucose powder does not dissolve in water. (a) True (b) False
34. 34.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
35. 35.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
36. 36.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
37. 37.⚖️ 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 kind of salt (b) days to see crystals (c) the same dish (d) the amount of water
38. 38.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
39. 39.True or false: melting butter is a change that cannot be undone. (a) False (b) True
40. 40.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed

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