Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 460 · 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.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
2. 2.⚖️ 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 kind of salt (b) the amount of water (c) sunny or shady place (d) days to see crystals
3. 3.True or false: melting butter is a change that cannot be undone. (a) True (b) False
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a piece of string (d) turmeric powder
6. 6.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
8. 8.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) dissolving salt (d) melting ice
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a spoon (d) a piece of string
10. 10.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
12. 12.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
15. 15.⚖️ 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
16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
17. 17.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) chalk powder (d) sugar
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) salt (d) warm water
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 measure it (b) we change it (c) we keep it the same
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
22. 22.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
23. 23.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
24. 24.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
25. 25.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.True or false: glucose powder dissolves in water. (a) False (b) True
28. 28.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
29. 29.🛟 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
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) warm water (d) a spoon
31. 31.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
32. 32.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
33. 33.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
34. 34.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) rusting iron (d) freezing water
35. 35.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧂 Which of these does not dissolve in water? (a) baking soda (b) chalk powder (c) food colour (d) table salt
37. 37.True or false: small pebbles does not dissolve in water. (a) True (b) False
38. 38.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
39. 39.True or false: warm water is needed for growing salt crystals. (a) True (b) False
40. 40.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) a balloon (d) yeast

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