Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 774 · 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.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) cooking oil (d) sawdust
2. 2.⚖️ 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 change it (b) we measure it (c) we keep it the same
3. 3.True or false: turmeric powder is not needed for growing salt crystals. (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 kind of salt is what we measure. (a) True (b) False
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
6. 6.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
7. 7.⚖️ 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
8. 8.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
9. 9.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
10. 10.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
12. 12.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) sugar (d) food colour
13. 13.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
14. 14.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
16. 16.True or false: chalk powder does not dissolve in water. (a) False (b) True
17. 17.⚖️ 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) sunny or shady place (d) the amount of salt
18. 18.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) salt (d) a piece of string
20. 20.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) a shallow dish (d) a piece of string
22. 22.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) food colour (d) glucose powder
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of water (b) days to see crystals (c) sunny or shady place
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) a mirror
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) warm water (d) a battery cell
26. 26.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
27. 27.True or false: glucose powder dissolves in water. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) sawdust (d) food colour
29. 29.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
30. 30.True or false: rusting iron is a change that can be undone. (a) True (b) False
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
32. 32.True or false: baking soda does not dissolve in water. (a) True (b) False
33. 33.⚖️ 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) True (b) False
34. 34.⚖️ 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
35. 35.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) cooking an egg (d) dissolving salt
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) a magnet
38. 38.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
39. 39.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
40. 40.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False

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