Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 418 · 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.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a piece of string (c) warm water (d) salt
4. 4.⚖️ 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) the kind of salt (c) the same dish (d) days to see crystals
5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
7. 7.🧂 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) food colour (d) glucose powder
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) yeast (d) turmeric powder
9. 9.⚖️ 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 amount of water (c) days to see crystals
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) turmeric powder (d) a shallow dish
11. 11.True or false: warm water is needed for growing salt crystals. (a) True (b) False
12. 12.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
13. 13.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) cooking an egg (d) melting ice
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
16. 16.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.True or false: chalk powder dissolves in water. (a) True (b) False
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) yeast (d) a piece of string
19. 19.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) food colour (d) glucose powder
20. 20.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
21. 21.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) yeast (d) a spoon
23. 23.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) rusting iron (d) folding paper
25. 25.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
27. 27.True or false: sugar dissolves in water. (a) False (b) True
28. 28.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
29. 29.True or false: freezing water is a change that cannot be undone. (a) True (b) False
30. 30.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
31. 31.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.⚖️ 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
33. 33.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
34. 34.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) rusting iron (d) melting butter
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a shallow dish (d) a mirror
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) salt (d) a spoon
37. 37.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
38. 38.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
39. 39.⚖️ 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
40. 40.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve

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