Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 782 · 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: freezing water is a change that can be undone. (a) False (b) True
2. 2.True or false: baking soda does not dissolve in water. (a) False (b) True
3. 3.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) sand (d) table salt
4. 4.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
5. 5.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
6. 6.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) rusting iron (d) browning lemon ink
7. 7.🧈 Which of these is a change that can be undone? (a) baking a cake (b) freezing water (c) browning lemon ink (d) cooking an egg
8. 8.True or false: glucose powder dissolves in water. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) food colour (d) sand
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a balloon (c) a spoon (d) salt
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
12. 12.True or false: food colour dissolves in water. (a) False (b) True
13. 13.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) yeast (d) warm water
15. 15.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) sand (d) sugar
16. 16.🧂 Which of these does not dissolve in water? (a) sugar (b) chalk powder (c) glucose powder (d) table salt
17. 17.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) freezing water (d) dissolving salt
18. 18.⚖️ 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 kind of salt (b) sunny or shady place (c) the same dish (d) the amount of water
19. 19.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
20. 20.True or false: sand dissolves in water. (a) False (b) True
21. 21.⚖️ 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
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
23. 23.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) a battery cell (d) a spoon
25. 25.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) sugar (d) sand
26. 26.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
27. 27.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
28. 28.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) a spoon (d) salt
30. 30.⚖️ 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
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) salt (d) a piece of string
33. 33.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a shallow dish (d) a spoon
35. 35.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) turmeric powder (c) a shallow dish (d) warm water
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the kind of salt (b) the same dish (c) sunny or shady place (d) days to see crystals
38. 38.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) glucose powder (d) cooking oil
39. 39.⚖️ 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 change it (c) we measure it
40. 40.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True

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