Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 137 · 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.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
2. 2.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) salt (d) a magnet
3. 3.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) rusting iron (d) dissolving salt
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a shallow dish (c) yeast (d) a battery cell
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
6. 6.⚖️ 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
7. 7.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) turmeric powder
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
10. 10.🧂 Which of these dissolves in water? (a) chalk powder (b) glucose powder (c) sawdust (d) cooking oil
11. 11.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) small pebbles (d) baking soda
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a spoon (d) a magnet
13. 13.🔍 Which is the odd one out? (a) sand (b) baking soda (c) food colour (d) sugar
14. 14.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) turmeric powder (d) warm water
15. 15.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
16. 16.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
18. 18.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
19. 19.⚖️ 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 amount of water (b) the same dish (c) the amount of salt (d) sunny or shady place
20. 20.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) freezing water (d) milk turning to curd
21. 21.⚖️ 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) days to see crystals (c) the kind of salt (d) sunny or shady place
22. 22.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) yeast (c) a piece of string (d) warm water
24. 24.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting ice (c) browning lemon ink (d) cooking an egg
25. 25.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) table salt (d) glucose powder
27. 27.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) sawdust (d) baking soda
28. 28.⚖️ 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
29. 29.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
30. 30.True or false: table salt dissolves in water. (a) False (b) True
31. 31.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) rusting iron (d) melting butter
33. 33.🧈 Which of these is a change that can be undone? (a) freezing water (b) browning lemon ink (c) milk turning to curd (d) baking a cake
34. 34.⚖️ 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 measure it (c) we change it
35. 35.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) milk turning to curd (d) rusting iron
37. 37.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
38. 38.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.True or false: melting butter is a change that cannot be undone. (a) False (b) True
40. 40.True or false: baking a cake is a change that can be undone. (a) False (b) True

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