Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 844 · 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 needed for growing salt crystals? (a) yeast (b) a mirror (c) warm water (d) a balloon
2. 2.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) cooking oil (d) sand
3. 3.True or false: chalk powder does not dissolve in water. (a) True (b) False
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
5. 5.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) freezing water (d) baking a cake
7. 7.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) dissolving salt (d) baking a cake
8. 8.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
9. 9.True or false: table salt does not dissolve in water. (a) False (b) True
10. 10.⚖️ 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 same dish (d) days to see crystals
11. 11.⚖️ 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 measure it (c) we change it
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) salt (d) a magnet
14. 14.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) yeast (d) warm water
16. 16.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
17. 17.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
18. 18.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.True or false: table salt dissolves in water. (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 same dish”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
22. 22.True or false: folding paper is a change that cannot be undone. (a) True (b) False
23. 23.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
25. 25.⚖️ 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
26. 26.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
27. 27.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
28. 28.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a shallow dish (d) a spoon
30. 30.True or false: sand dissolves in water. (a) False (b) True
31. 31.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) table salt (d) small pebbles
32. 32.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
34. 34.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sugar (d) sawdust
36. 36.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
37. 37.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
39. 39.⚖️ 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) True (b) False
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it

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