Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 710 · 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.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
2. 2.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) sand (b) food colour (c) sawdust (d) small pebbles
4. 4.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.True or false: food colour does not dissolve in water. (a) True (b) False
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 change it (c) we measure it
7. 7.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) folding paper (c) dissolving salt (d) melting ice
9. 9.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
10. 10.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a magnet (d) salt
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
13. 13.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) a battery cell (d) warm water
14. 14.🧂 Which of these does not dissolve in water? (a) cooking oil (b) baking soda (c) glucose powder (d) food colour
15. 15.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) cooking an egg (c) melting butter (d) dissolving salt
17. 17.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) table salt (d) glucose powder
19. 19.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
21. 21.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
23. 23.⚖️ 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
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
25. 25.True or false: small pebbles dissolves in water. (a) True (b) False
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
27. 27.True or false: cooking oil dissolves in water. (a) True (b) False
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
29. 29.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) cooking an egg (d) baking a cake
30. 30.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) small pebbles (d) chalk powder
31. 31.⚖️ 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 change it (b) we measure it (c) we keep it the same
32. 32.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) a mirror (d) a magnet
34. 34.True or false: baking soda dissolves in water. (a) True (b) False
35. 35.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
36. 36.⚖️ 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) True (b) False
37. 37.True or false: glucose powder does not dissolve in water. (a) True (b) False
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a shallow dish (d) a battery cell
39. 39.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) turmeric powder (d) a battery cell
40. 40.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby

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