Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 680 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
2. 2.True or false: sawdust dissolves in water. (a) False (b) True
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) a piece of string (d) a shallow dish
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
5. 5.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
6. 6.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) a mirror (d) a piece of string
8. 8.⚖️ 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
9. 9.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
10. 10.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) cooking oil (d) sand
12. 12.⚖️ 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) True (b) False
13. 13.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
14. 14.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) folding paper (d) milk turning to curd
15. 15.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
16. 16.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.True or false: sawdust does not dissolve in water. (a) False (b) True
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
20. 20.True or false: turmeric powder is needed for growing salt crystals. (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 “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.True or false: table salt does not dissolve in water. (a) False (b) True
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) salt (d) a piece of string
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) warm water (d) a mirror
26. 26.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) yeast (d) a shallow dish
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a spoon (c) a shallow dish (d) warm water
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a spoon (d) a balloon
30. 30.True or false: folding paper is a change that can be undone. (a) False (b) True
31. 31.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
32. 32.⚖️ 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 salt (d) the kind of salt
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) a balloon (d) a battery cell
34. 34.True or false: salt is needed for growing salt crystals. (a) False (b) True
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
36. 36.⚖️ 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 change it (b) we keep it the same (c) we measure it
37. 37.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) cooking an egg (d) folding paper
38. 38.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) freezing water (c) melting ice (d) dissolving salt
39. 39.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) melting ice (d) cooking an egg
40. 40.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) food colour (d) sawdust

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