Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 765 · 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.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) food colour (d) sawdust
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.⚖️ 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
4. 4.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) a shallow dish (d) a spoon
6. 6.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) warm water (d) a magnet
8. 8.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the kind of salt (b) the amount of salt (c) days to see crystals (d) sunny or shady place
10. 10.⚖️ 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) False (b) True
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) a spoon (d) a shallow dish
12. 12.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
13. 13.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) baking a cake (d) rusting iron
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a spoon (d) a mirror
16. 16.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
17. 17.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
18. 18.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a battery cell (d) salt
19. 19.⚖️ 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) the kind of salt (c) days to see crystals
20. 20.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
21. 21.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) folding paper (c) dissolving salt (d) freezing water
22. 22.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to cool the water (d) to make it fizz
23. 23.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) sawdust (d) table salt
24. 24.True or false: table salt does not dissolve in water. (a) True (b) False
25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) warm water (d) a magnet
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) turmeric powder (d) a shallow dish
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
30. 30.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
31. 31.⚖️ 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 amount of salt (c) days to see crystals (d) the amount of water
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a piece of string (c) warm water (d) a shallow dish
35. 35.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) table salt (d) cooking oil
36. 36.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
38. 38.⚖️ 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) False (b) True
39. 39.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) folding paper (d) baking a cake

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