Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 77 · 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: chalk powder dissolves in water. (a) False (b) True
2. 2.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a piece of string (d) a shallow dish
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) turmeric powder (d) a piece of string
5. 5.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) table salt (d) small pebbles
6. 6.True or false: freezing water is a change that cannot be undone. (a) False (b) True
7. 7.⚖️ 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 measure it (c) we keep it the same
8. 8.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a shallow dish (d) a mirror
11. 11.True or false: folding paper is a change that cannot be undone. (a) False (b) True
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
13. 13.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
14. 14.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) chalk powder (d) sugar
15. 15.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) cooking oil (d) chalk powder
16. 16.⚖️ 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 salt (b) days to see crystals (c) sunny or shady place
17. 17.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) sawdust (d) glucose powder
18. 18.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
20. 20.⚖️ 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
21. 21.⚖️ 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 keep it the same (b) we measure it (c) we change it
22. 22.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) baking a cake (d) melting ice
23. 23.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
24. 24.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) milk turning to curd (d) dissolving salt
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) a spoon (d) warm water
26. 26.True or false: table salt dissolves in water. (a) False (b) True
27. 27.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
28. 28.True or false: cooking oil dissolves in water. (a) False (b) True
29. 29.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) melting ice (d) freezing water
30. 30.🧈 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
31. 31.True or false: salt is not needed for growing salt crystals. (a) False (b) True
32. 32.🛟 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
33. 33.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
34. 34.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
36. 36.🧂 Which of these dissolves in water? (a) cooking oil (b) glucose powder (c) sand (d) chalk powder
37. 37.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
38. 38.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) the same dish (d) sunny or shady place
40. 40.⚖️ 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 change it (c) we keep it the same

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