Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 189 · 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 mirror for growing salt crystals? (a) needed (b) not needed
2. 2.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
3. 3.⚖️ 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) True (b) False
4. 4.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) chalk powder (d) cooking oil
6. 6.⚖️ 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
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
9. 9.🧂 Which of these does not dissolve in water? (a) sand (b) food colour (c) glucose powder (d) sugar
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
11. 11.True or false: folding paper is a change that can be undone. (a) False (b) True
12. 12.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
13. 13.🧂 Which of these does not dissolve in water? (a) baking soda (b) small pebbles (c) table salt (d) sugar
14. 14.True or false: sugar dissolves in water. (a) True (b) False
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a shallow dish (d) salt
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
18. 18.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a battery cell (d) a spoon
20. 20.⚖️ 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 amount of water (b) the same dish (c) the kind of salt (d) days to see crystals
21. 21.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
22. 22.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
23. 23.True or false: melting butter is a change that can be undone. (a) False (b) True
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
26. 26.True or false: sawdust dissolves in water. (a) True (b) False
27. 27.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) cooking an egg (d) dissolving salt
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
29. 29.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
31. 31.⚖️ 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
32. 32.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sugar (d) sawdust
33. 33.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a piece of string (d) a mirror
35. 35.⚖️ 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
36. 36.True or false: dissolving salt is a change that can be undone. (a) False (b) True
37. 37.True or false: baking a cake is a change that can be undone. (a) True (b) False
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) salt (d) a piece of string
39. 39.⚖️ 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) days to see crystals (c) sunny or shady place (d) the amount of salt
40. 40.True or false: rusting iron is a change that cannot be undone. (a) True (b) False

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