Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 68 · 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 shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) a spoon (d) warm water
5. 5.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) cooking an egg (c) melting butter (d) freezing water
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) salt (c) a magnet (d) turmeric powder
7. 7.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) sawdust (d) table salt
8. 8.⚖️ 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
9. 9.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) food colour (d) glucose powder
11. 11.True or false: sugar does not dissolve in water. (a) True (b) False
12. 12.⚖️ 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 keep it the same (b) we change it (c) we measure it
13. 13.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
15. 15.True or false: melting butter is a change that can be undone. (a) True (b) False
16. 16.⚖️ 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) the amount of water (c) the amount of salt (d) sunny or shady place
17. 17.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a battery cell (d) salt
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a shallow dish (d) yeast
20. 20.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
22. 22.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
23. 23.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) small pebbles (d) sawdust
24. 24.True or false: sawdust dissolves in water. (a) True (b) False
25. 25.True or false: chalk powder does not dissolve in water. (a) False (b) True
26. 26.🧂 Which of these dissolves in water? (a) small pebbles (b) food colour (c) sawdust (d) sand
27. 27.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
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 salt”? (a) we change it (b) we keep it the same (c) we measure it
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 kept the same. (a) True (b) False
30. 30.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.True or false: sand does not dissolve in water. (a) False (b) True
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) warm water (d) a piece of string
33. 33.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a battery cell (c) turmeric powder (d) a magnet
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
36. 36.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
37. 37.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) freezing water (d) cooking an egg
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) folding paper (d) baking a cake
39. 39.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
40. 40.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True

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