Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 441 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) salt (d) turmeric powder
2. 2.🔍 Which is the odd one out? (a) cooking oil (b) glucose powder (c) sawdust (d) chalk powder
3. 3.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
4. 4.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
5. 5.⚖️ 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
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a magnet (d) a spoon
8. 8.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
10. 10.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
11. 11.⚖️ 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 keep it the same (c) we change it
12. 12.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
13. 13.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
14. 14.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
15. 15.True or false: melting ice is a change that can be undone. (a) False (b) True
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) a piece of string (d) a spoon
19. 19.True or false: food colour does not dissolve in water. (a) False (b) True
20. 20.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) baking a cake (d) melting ice
21. 21.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
22. 22.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) sugar (d) small pebbles
23. 23.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) turmeric powder (d) a magnet
25. 25.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
27. 27.⚖️ 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) sunny or shady place (b) the kind of salt (c) the amount of salt (d) the same dish
28. 28.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
29. 29.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) dissolving salt (d) melting ice
30. 30.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.True or false: baking soda dissolves in water. (a) False (b) True
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
33. 33.🧈 Can this change be undone: freezing water? (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 “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) a balloon
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
38. 38.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
40. 40.⚖️ 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

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