Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 432 · 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) table salt (b) sand (c) sawdust (d) small pebbles
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) salt (c) a piece of string (d) warm water
3. 3.True or false: small pebbles does not dissolve in water. (a) True (b) False
4. 4.⚖️ 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 measure it (b) we change it (c) we keep it the same
5. 5.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) dissolving salt (d) rusting iron
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a spoon (d) turmeric powder
10. 10.⚖️ 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 same dish (c) sunny or shady place
11. 11.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
12. 12.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
13. 13.True or false: table salt dissolves in water. (a) False (b) True
14. 14.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) dissolving salt (c) melting butter (d) melting ice
15. 15.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) salt rains down (d) sand is ground up
16. 16.🧂 Which of these does not dissolve in water? (a) sawdust (b) glucose powder (c) baking soda (d) table salt
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a shallow dish (d) a magnet
18. 18.True or false: food colour does not dissolve in water. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) food colour (d) baking soda
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) warm water (c) a mirror (d) yeast
21. 21.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.True or false: yeast is needed for growing salt crystals. (a) True (b) False
23. 23.True or false: baking a cake is a change that can be undone. (a) False (b) True
24. 24.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) melting ice (d) cooking an egg
25. 25.⚖️ 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) sunny or shady place (b) the amount of salt (c) the kind of salt (d) the amount of water
26. 26.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.⚖️ 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 keep it the same (b) we change it (c) we measure it
28. 28.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) chalk powder (d) glucose powder
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) a balloon
31. 31.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
32. 32.⚖️ 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) sunny or shady place (c) the same dish (d) days to see crystals
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a battery cell (c) a spoon (d) salt
34. 34.True or false: dissolving salt is a change that can be undone. (a) False (b) True
35. 35.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) table salt (b) food colour (c) glucose powder (d) chalk powder
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) salt (d) a magnet
38. 38.⚖️ 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
39. 39.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
40. 40.True or false: baking soda does not dissolve in water. (a) True (b) False

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