Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 30 · 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: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
2. 2.True or false: small pebbles dissolves in water. (a) True (b) False
3. 3.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) a magnet (d) a piece of string
5. 5.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
8. 8.🔍 Which is the odd one out? (a) glucose powder (b) cooking oil (c) small pebbles (d) chalk powder
9. 9.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) yeast (d) salt
11. 11.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) turmeric powder (d) warm water
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
14. 14.⚖️ 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 keep it the same (b) we measure it (c) we change it
15. 15.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) glucose powder (d) sugar
17. 17.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) folding paper (d) dissolving salt
18. 18.⚖️ 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
19. 19.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) baking a cake (d) dissolving salt
21. 21.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a shallow dish (d) a balloon
22. 22.True or false: baking soda does not dissolve in water. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) sand (b) baking soda (c) small pebbles (d) chalk powder
24. 24.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
25. 25.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) sugar (d) small pebbles
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) table salt (d) small pebbles
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
30. 30.⚖️ 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
31. 31.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) cooking an egg (d) melting ice
32. 32.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a balloon (d) salt
34. 34.🧈 Which of these is a change that can be undone? (a) folding paper (b) rusting iron (c) milk turning to curd (d) browning lemon ink
35. 35.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
36. 36.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) salt (d) warm water
38. 38.True or false: table salt dissolves in water. (a) False (b) True
39. 39.⚖️ 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) the amount of salt (c) sunny or shady place
40. 40.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone

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