Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 66 · 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.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a mirror (d) a piece of string
4. 4.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
5. 5.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) freezing water (d) melting ice
6. 6.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
7. 7.⚖️ 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
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) baking soda (d) glucose powder
10. 10.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) warm water (d) salt
12. 12.⚖️ 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
13. 13.⚖️ 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
14. 14.🔍 Which is the odd one out? (a) sugar (b) sand (c) table salt (d) glucose powder
15. 15.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
16. 16.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
17. 17.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
18. 18.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
19. 19.True or false: melting ice is a change that cannot be undone. (a) True (b) False
20. 20.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
21. 21.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a balloon (c) a battery cell (d) a magnet
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a balloon (d) salt
23. 23.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
25. 25.True or false: food colour dissolves in water. (a) True (b) False
26. 26.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
27. 27.🛟 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
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 keep it the same (b) we measure it (c) we change it
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.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
31. 31.🧂 Which of these dissolves in water? (a) baking soda (b) cooking oil (c) small pebbles (d) sawdust
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a battery cell (c) salt (d) a piece of string
33. 33.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) baking a cake (d) cooking an egg
34. 34.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) baking a cake (c) dissolving salt (d) melting ice
35. 35.🧂 Which of these dissolves in water? (a) table salt (b) small pebbles (c) sand (d) cooking oil
36. 36.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a spoon (c) a balloon (d) a magnet
37. 37.⚖️ 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 amount of water (c) days to see crystals
38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
39. 39.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) dissolving salt (d) milk turning to curd
40. 40.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) freezing water (c) dissolving salt (d) folding paper

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