Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 375 · 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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) turmeric powder (d) warm water
3. 3.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) table salt (d) small pebbles
4. 4.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
5. 5.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) table salt (d) cooking oil
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a magnet (d) a shallow dish
9. 9.True or false: sugar dissolves in water. (a) True (b) False
10. 10.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
11. 11.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
12. 12.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.True or false: yeast is needed for growing salt crystals. (a) True (b) False
14. 14.⚖️ 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 same dish (b) days to see crystals (c) the amount of salt (d) sunny or shady place
15. 15.True or false: melting butter is a change that can be undone. (a) False (b) True
16. 16.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) a magnet
18. 18.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
19. 19.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) rusting iron (d) dissolving salt
20. 20.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
22. 22.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
23. 23.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) small pebbles (d) glucose powder
24. 24.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the same dish (c) days to see crystals
26. 26.⚖️ 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
27. 27.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) chalk powder (d) baking soda
29. 29.🔍 Which is the odd one out? (a) sand (b) sawdust (c) cooking oil (d) food colour
30. 30.True or false: folding paper is a change that can be undone. (a) True (b) False
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) salt (d) turmeric powder
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
34. 34.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) baking a cake (d) melting butter
35. 35.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
36. 36.🧈 Which of these is a change that can be undone? (a) rusting iron (b) folding paper (c) milk turning to curd (d) baking a cake
37. 37.⚖️ 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
38. 38.🧂 Which of these does not dissolve in water? (a) sugar (b) sand (c) table salt (d) food colour
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 kept the same. (a) False (b) True
40. 40.True or false: warm water is not needed for growing salt crystals. (a) True (b) False

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