Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 904 · 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.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.True or false: freezing water is a change that can be undone. (a) True (b) False
3. 3.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
4. 4.True or false: chalk powder dissolves in water. (a) True (b) False
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) a magnet (d) a battery cell
6. 6.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) sawdust (d) table salt
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a spoon (d) a magnet
8. 8.True or false: baking soda dissolves in water. (a) False (b) True
9. 9.⚖️ 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 keep it the same (c) we measure it
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a piece of string (d) turmeric powder
12. 12.⚖️ 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) days to see crystals (d) the amount of salt
13. 13.True or false: cooking oil dissolves in water. (a) False (b) True
14. 14.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) rusting iron (d) folding paper
15. 15.🔍 Which is the odd one out? (a) table salt (b) sugar (c) food colour (d) small pebbles
16. 16.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) chalk powder (d) sugar
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
18. 18.True or false: table salt does not dissolve in water. (a) False (b) True
19. 19.⚖️ 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
20. 20.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sawdust (c) food colour (d) sugar
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) warm water (d) a magnet
22. 22.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
23. 23.True or false: cooking an egg is a change that can be undone. (a) False (b) True
24. 24.⚖️ 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
25. 25.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) chalk powder (d) glucose powder
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) dissolving salt (d) browning lemon ink
30. 30.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.⚖️ 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
32. 32.True or false: sawdust dissolves in water. (a) True (b) False
33. 33.⚖️ 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 change it (b) we keep it the same (c) we measure it
34. 34.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) sawdust (d) food colour
36. 36.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
37. 37.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a battery cell (d) a piece of string
39. 39.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) baking a cake (d) melting butter
40. 40.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) dissolving salt (d) rusting iron

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