Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 797 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a piece of string (d) salt
2. 2.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) a magnet (d) warm water
3. 3.True or false: melting butter is a change that can be undone. (a) True (b) False
4. 4.True or false: folding paper is a change that can be undone. (a) True (b) False
5. 5.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
7. 7.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
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 measure it (b) we change it (c) we keep it the same
9. 9.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) small pebbles (d) table salt
11. 11.🔮 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
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
13. 13.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a battery cell (d) warm water
15. 15.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
16. 16.🧂 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 fizz (d) to make it very salty
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
18. 18.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
19. 19.True or false: warm water is needed for growing salt crystals. (a) False (b) True
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a spoon (c) warm water (d) salt
22. 22.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) folding paper (d) cooking an egg
23. 23.🧈 Which of these is a change that can be undone? (a) melting butter (b) browning lemon ink (c) rusting iron (d) baking a cake
24. 24.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
25. 25.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) milk turning to curd (d) browning lemon ink
26. 26.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
27. 27.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) melting ice (d) cooking an egg
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.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
30. 30.⚖️ 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
31. 31.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) the dish melts (d) salt grows roots
32. 32.🔍 Which is the odd one out? (a) table salt (b) food colour (c) sugar (d) chalk powder
33. 33.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
34. 34.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.True or false: sand does not dissolve in water. (a) False (b) True
36. 36.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
37. 37.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
38. 38.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
39. 39.True or false: sawdust dissolves in water. (a) True (b) False
40. 40.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) freezing water (d) rusting iron

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