Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 419 · 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.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sand (d) sugar
2. 2.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
3. 3.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
4. 4.True or false: baking soda dissolves in water. (a) True (b) False
5. 5.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) baking a cake (d) melting ice
7. 7.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
8. 8.True or false: freezing water is a change that can be undone. (a) True (b) False
9. 9.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) cooking an egg (d) melting ice
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) turmeric powder (d) a shallow dish
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
13. 13.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
14. 14.True or false: dissolving salt is a change that can be undone. (a) True (b) False
15. 15.⚖️ 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) sunny or shady place (c) the amount of water
16. 16.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
17. 17.True or false: table salt dissolves in water. (a) True (b) False
18. 18.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
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.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
21. 21.🔍 Which is the odd one out? (a) baking soda (b) small pebbles (c) food colour (d) sugar
22. 22.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
23. 23.⚖️ 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 same dish (b) days to see crystals (c) the kind of salt (d) sunny or shady place
24. 24.⚖️ 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
25. 25.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) dissolving salt (d) freezing water
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) salt (d) a magnet
27. 27.True or false: freezing water is a change that cannot be undone. (a) True (b) False
28. 28.⚖️ 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 measure it (b) we change it (c) we keep it the same
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
30. 30.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
31. 31.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) food colour (d) chalk powder
32. 32.⚖️ 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) True (b) False
33. 33.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
34. 34.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sugar (d) cooking oil
35. 35.True or false: yeast is needed for growing salt crystals. (a) True (b) False
36. 36.True or false: folding paper is a change that can be undone. (a) True (b) False
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) warm water (d) yeast
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a magnet (d) a shallow dish
39. 39.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) sand is ground up (d) fish make it
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) a shallow dish (d) warm water

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