Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 468 · 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.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
2. 2.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
3. 3.True or false: baking soda does not dissolve in water. (a) True (b) False
4. 4.⚖️ 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 same dish (c) the amount of water (d) the amount of salt
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) a mirror
6. 6.True or false: dissolving salt is a change that can be undone. (a) False (b) True
7. 7.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
8. 8.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting ice (c) milk turning to curd (d) rusting iron
9. 9.True or false: rusting iron is a change that can be undone. (a) False (b) True
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a spoon (d) turmeric powder
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a piece of string (d) a mirror
12. 12.⚖️ 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 salt
13. 13.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
14. 14.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
15. 15.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
17. 17.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: melting butter is a change that can be undone. (a) True (b) False
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) yeast (d) a magnet
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) bigger crystals (d) smaller crystals
22. 22.True or false: melting ice is a change that can be undone. (a) False (b) True
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) salt (c) a shallow dish (d) a spoon
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) a magnet
25. 25.True or false: table salt does not dissolve in water. (a) False (b) True
26. 26.⚖️ 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 measure it (b) we keep it the same (c) we change it
27. 27.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) table salt (d) glucose powder
29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
30. 30.⚖️ 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
31. 31.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) yeast (c) a shallow dish (d) a spoon
33. 33.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
34. 34.⚖️ 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 same dish (c) sunny or shady place
35. 35.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) warm water (c) a magnet (d) a battery cell
36. 36.True or false: chalk powder dissolves in water. (a) True (b) False
37. 37.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
38. 38.⚖️ 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
39. 39.🧈 Which of these is a change that can be undone? (a) baking a cake (b) freezing water (c) milk turning to curd (d) rusting iron
40. 40.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True

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