Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 828 · 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 stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
2. 2.⚖️ 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 water (b) sunny or shady place (c) the kind of salt (d) days to see crystals
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a piece of string (d) warm water
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) cooking oil (d) glucose powder
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a piece of string (d) a shallow dish
7. 7.⚖️ 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) True (b) False
8. 8.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
9. 9.True or false: melting butter is a change that can be undone. (a) False (b) True
10. 10.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) salt (c) a balloon (d) turmeric powder
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) a spoon (d) a shallow dish
13. 13.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) chalk powder (d) sugar
14. 14.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a piece of string (d) turmeric powder
16. 16.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) baking a cake (c) freezing water (d) melting ice
17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
18. 18.⚖️ 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 measure it (c) we keep it the same
19. 19.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
20. 20.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) glucose powder (d) sawdust
22. 22.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) freezing water (d) milk turning to curd
23. 23.🛟 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
24. 24.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a piece of string (d) warm water
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
27. 27.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
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.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
31. 31.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
32. 32.⚖️ 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 keep it the same (c) we measure it
33. 33.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) chalk powder
35. 35.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a magnet (d) turmeric powder
37. 37.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
38. 38.🔍 Which is the odd one out? (a) sugar (b) sand (c) food colour (d) table salt
39. 39.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
40. 40.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) food colour (d) sugar

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