Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 715 · 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.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
3. 3.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) sugar (d) table salt
5. 5.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
6. 6.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
7. 7.⚖️ 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 amount of salt (b) sunny or shady place (c) the kind of salt (d) the amount of water
8. 8.True or false: yeast is needed for growing salt crystals. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) sugar (d) small pebbles
10. 10.True or false: dissolving salt is a change that can be undone. (a) True (b) False
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) salt (d) a spoon
12. 12.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
13. 13.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) dissolving salt (c) freezing water (d) melting ice
14. 14.⚖️ 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
15. 15.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) baking a cake (c) milk turning to curd (d) rusting iron
16. 16.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) food colour (d) cooking oil
17. 17.⚖️ 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
18. 18.True or false: baking soda does not dissolve in water. (a) False (b) True
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) a battery cell (d) a magnet
20. 20.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
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) days to see crystals (b) the kind of salt (c) sunny or shady place
22. 22.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
23. 23.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
24. 24.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) cooking an egg (c) dissolving salt (d) melting butter
25. 25.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a mirror (c) a spoon (d) warm water
27. 27.🔍 Which is the odd one out? (a) sawdust (b) sand (c) chalk powder (d) glucose powder
28. 28.⚖️ 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 measure it (b) we keep it the same (c) we change it
29. 29.🧂 Which of these dissolves in water? (a) small pebbles (b) table salt (c) cooking oil (d) sand
30. 30.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a piece of string (d) a shallow dish
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
33. 33.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) yeast (d) a piece of string
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
36. 36.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
37. 37.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
38. 38.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧂 Which of these does not dissolve in water? (a) small pebbles (b) sugar (c) food colour (d) glucose powder
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False

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