Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 882 · 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.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
3. 3.⚖️ 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) the kind of salt (b) the amount of water (c) sunny or shady place (d) days to see crystals
4. 4.⚖️ 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
5. 5.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) warm water (d) salt
7. 7.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to change its colour (d) to make it fizz
8. 8.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.⚖️ 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
10. 10.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.⚖️ 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 same dish
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
13. 13.⚖️ 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 keep it the same (b) we change it (c) we measure it
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
15. 15.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
16. 16.True or false: cooking an egg is a change that can be undone. (a) False (b) True
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) a piece of string (d) a shallow dish
18. 18.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
19. 19.True or false: food colour does not dissolve in water. (a) True (b) False
20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
21. 21.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
22. 22.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) crystals grow faster (d) it turns sweet
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
24. 24.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting butter (c) milk turning to curd (d) browning lemon ink
25. 25.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) sawdust (d) sand
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a magnet (d) a spoon
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
28. 28.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sand (c) table salt (d) sugar
29. 29.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a spoon (d) yeast
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a battery cell (d) salt
32. 32.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) sawdust (d) glucose powder
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a spoon (d) warm water
34. 34.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) cooking oil (d) sawdust
37. 37.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) cooking an egg (d) rusting iron
38. 38.⚖️ 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
39. 39.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
40. 40.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a magnet (d) a spoon

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