Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 644 · 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: turmeric powder is needed for growing salt crystals. (a) False (b) True
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) turmeric powder (d) a spoon
3. 3.⚖️ 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 amount of water (c) the same dish (d) the kind of salt
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a mirror (d) a piece of string
5. 5.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
6. 6.True or false: chalk powder dissolves in water. (a) True (b) False
7. 7.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a mirror (d) a shallow dish
8. 8.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) baking a cake (c) melting ice (d) melting butter
9. 9.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
10. 10.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
12. 12.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
13. 13.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
15. 15.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
16. 16.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sawdust (d) chalk powder
17. 17.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) warm water (d) a battery cell
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
21. 21.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.⚖️ 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 keep it the same (b) we measure it (c) we change it
23. 23.🧈 Which of these is a change that can be undone? (a) rusting iron (b) freezing water (c) baking a cake (d) milk turning to curd
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) warm water (d) a spoon
25. 25.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) table salt (d) glucose powder
26. 26.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
27. 27.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) days to see crystals (d) the amount of water
29. 29.⚖️ 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 change it (c) we measure it
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) a shallow dish (d) turmeric powder
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
32. 32.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) glucose powder (d) chalk powder
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a magnet
34. 34.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
35. 35.True or false: freezing water is a change that can be undone. (a) False (b) True
36. 36.⚖️ 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) the amount of salt (c) days to see crystals
37. 37.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
38. 38.🧈 Which of these is a change that can be undone? (a) folding paper (b) baking a cake (c) rusting iron (d) cooking an egg
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) warm water (d) a spoon
40. 40.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed

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