Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 173 · 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.⚖️ 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) the kind of salt (c) days to see crystals (d) the same dish
2. 2.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) sugar (d) chalk powder
3. 3.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in 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 same dish”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
7. 7.True or false: melting ice is a change that cannot be undone. (a) True (b) False
8. 8.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
10. 10.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) glucose powder (d) sugar
11. 11.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
12. 12.True or false: salt is needed for growing salt crystals. (a) False (b) True
13. 13.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) food colour (d) sawdust
14. 14.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
15. 15.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
16. 16.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
19. 19.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
20. 20.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
21. 21.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
22. 22.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) sand (d) baking soda
23. 23.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
24. 24.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
25. 25.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
26. 26.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) a spoon (d) salt
29. 29.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) dissolving salt (d) cooking an egg
30. 30.⚖️ 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
31. 31.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a battery cell (d) warm water
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a balloon (d) warm water
35. 35.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.True or false: table salt dissolves in water. (a) False (b) True
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a battery cell (d) a piece of string
39. 39.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) glucose powder (d) table salt
40. 40.True or false: small pebbles does not dissolve in water. (a) False (b) True

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