Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 335 · 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 of these is a change that cannot be undone? (a) milk turning to curd (b) melting ice (c) folding paper (d) freezing water
2. 2.🔮 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
3. 3.True or false: cooking an egg is a change that can be undone. (a) True (b) False
4. 4.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a spoon (c) a mirror (d) a balloon
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) a mirror (d) turmeric powder
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 keep it the same (b) we measure it (c) we change it
7. 7.True or false: chalk powder dissolves in water. (a) True (b) False
8. 8.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a spoon (d) a piece of string
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
11. 11.⚖️ 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
12. 12.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧂 Which of these dissolves in water? (a) sugar (b) sand (c) cooking oil (d) small pebbles
14. 14.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
15. 15.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sand (d) baking soda
16. 16.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a mirror (d) a shallow dish
17. 17.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
18. 18.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
20. 20.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) salt (d) a shallow dish
22. 22.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
24. 24.⚖️ 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 same dish (d) the amount of water
25. 25.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) food colour (d) small pebbles
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the amount of salt (d) the kind of salt
27. 27.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
28. 28.True or false: sand dissolves in water. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) sugar (d) cooking oil
30. 30.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
31. 31.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
32. 32.True or false: baking soda does not dissolve in water. (a) True (b) False
33. 33.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
34. 34.⚖️ 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
35. 35.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) table salt (d) glucose powder
36. 36.⚖️ 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 measure it (c) we keep it the same
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) salt (d) a spoon
38. 38.True or false: rusting iron is a change that can be undone. (a) False (b) True
39. 39.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
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 kept the same. (a) False (b) True

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