Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 358 · 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.True or false: baking a cake is a change that can be undone. (a) True (b) False
2. 2.True or false: melting ice is a change that cannot be undone. (a) False (b) True
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
4. 4.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) warm water (d) a magnet
6. 6.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
7. 7.⚖️ 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
8. 8.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
10. 10.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
11. 11.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sugar (d) sand
13. 13.True or false: sand dissolves in water. (a) True (b) False
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) a magnet (d) turmeric powder
15. 15.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
17. 17.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
19. 19.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
21. 21.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
22. 22.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
23. 23.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
24. 24.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) warm water (d) a magnet
25. 25.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) table salt (d) glucose powder
26. 26.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) folding paper (d) melting ice
27. 27.⚖️ 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
28. 28.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a spoon (c) a balloon (d) a battery cell
30. 30.True or false: table salt does not dissolve in water. (a) False (b) True
31. 31.⚖️ 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
32. 32.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) frozen (d) empty
33. 33.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
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 change it (b) we keep it the same (c) we measure it
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a battery cell (d) a mirror
36. 36.True or false: sugar dissolves in water. (a) False (b) True
37. 37.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
38. 38.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
39. 39.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
40. 40.⚖️ 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) days to see crystals (c) the amount of water

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