Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 827 · 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 warm water for growing salt crystals? (a) needed (b) not needed
2. 2.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) melting butter (d) melting ice
3. 3.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
4. 4.True or false: sugar dissolves in water. (a) False (b) True
5. 5.⚖️ 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 change it (c) we keep it the same
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a piece of string (d) a magnet
7. 7.True or false: chalk powder does not dissolve in water. (a) True (b) False
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) days to see crystals (c) sunny or shady place
9. 9.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
10. 10.True or false: melting ice is a change that can be undone. (a) False (b) True
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
12. 12.True or false: folding paper is a change that can be undone. (a) True (b) False
13. 13.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
15. 15.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) table salt (d) sand
16. 16.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
18. 18.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
19. 19.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
21. 21.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
22. 22.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) melting ice (d) rusting iron
23. 23.True or false: warm water is needed for growing salt crystals. (a) True (b) False
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
25. 25.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
26. 26.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) cooking oil (d) table salt
27. 27.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) cooking oil (d) food colour
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a mirror (d) salt
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) a balloon
31. 31.⚖️ 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 kind of salt (b) sunny or shady place (c) the amount of salt (d) days to see crystals
32. 32.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) freezing water (d) rusting iron
33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
34. 34.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
35. 35.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧂 Which of these dissolves in water? (a) table salt (b) sand (c) cooking oil (d) chalk powder
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) yeast (d) a piece of string
38. 38.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
39. 39.True or false: melting butter is a change that can be undone. (a) True (b) False
40. 40.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) rusting iron (d) melting ice

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