Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 110 · 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: sugar does not dissolve in water. (a) False (b) True
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) salt (d) warm water
3. 3.🔮 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
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) a battery cell (d) a spoon
5. 5.True or false: freezing water is a change that cannot be undone. (a) False (b) True
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a magnet (d) a shallow dish
7. 7.⚖️ 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) days to see crystals (c) the amount of water
8. 8.⚖️ 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 keep it the same (b) we change it (c) we measure it
9. 9.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
10. 10.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
11. 11.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
13. 13.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) browning lemon ink (d) rusting iron
14. 14.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) dissolving salt (d) cooking an egg
15. 15.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
16. 16.True or false: rusting iron is a change that can be undone. (a) False (b) True
17. 17.⚖️ 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
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
19. 19.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) table salt (d) sand
20. 20.True or false: dissolving salt is a change that can be undone. (a) False (b) True
21. 21.⚖️ 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
22. 22.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
23. 23.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
24. 24.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a shallow dish (d) a battery cell
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) turmeric powder (d) warm water
27. 27.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) freezing water (d) melting butter
28. 28.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
29. 29.⚖️ 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
30. 30.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
31. 31.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting butter (c) melting ice (d) dissolving salt
32. 32.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
33. 33.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals
34. 34.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.⚖️ 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) False (b) True
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) salt (d) warm water
39. 39.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True

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