Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 535 · 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.⚖️ 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 change it (b) we keep it the same (c) we measure it
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
3. 3.⚖️ 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 kind of salt
4. 4.🧈 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
5. 5.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) dissolving salt (c) rusting iron (d) milk turning to curd
6. 6.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a magnet (c) turmeric powder (d) a battery cell
9. 9.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
10. 10.True or false: sand dissolves in water. (a) False (b) True
11. 11.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
12. 12.⚖️ 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
13. 13.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sand (c) sugar (d) baking soda
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) yeast (d) warm water
15. 15.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
16. 16.⚖️ 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) True (b) False
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) cooking oil (d) baking soda
19. 19.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
20. 20.⚖️ 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) sunny or shady place (c) days to see crystals
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
22. 22.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) salt rains down (d) sand is ground up
23. 23.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) salt (d) a piece of string
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a battery cell (d) a shallow dish
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) days to see crystals (b) the amount of water (c) the same dish (d) the kind of salt
29. 29.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
30. 30.⚖️ 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
31. 31.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) folding paper (d) milk turning to curd
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) salt (d) yeast
33. 33.⚖️ 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 keep it the same (c) we measure it
34. 34.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
35. 35.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a balloon (c) turmeric powder (d) a battery cell
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) a spoon (d) warm water
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a shallow dish (d) a battery cell
38. 38.⚖️ 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
39. 39.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water

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