Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 280 · 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 shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
2. 2.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
4. 4.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) cooking oil (d) glucose powder
5. 5.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a shallow dish (d) a battery cell
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 keep it the same (b) we change it (c) we measure it
9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
11. 11.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) chalk powder (d) baking soda
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
14. 14.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) melting ice (d) rusting iron
15. 15.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
16. 16.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) salt (c) a mirror (d) turmeric powder
18. 18.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
20. 20.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) chalk powder (d) baking soda
21. 21.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
24. 24.⚖️ 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 water (c) the same dish (d) days to see crystals
25. 25.True or false: baking a cake is a change that can be undone. (a) True (b) False
26. 26.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
27. 27.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
28. 28.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) glucose powder (d) chalk powder
29. 29.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) chalk powder (d) food colour
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a shallow dish (d) a balloon
31. 31.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) cooking oil (d) baking soda
33. 33.⚖️ 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
34. 34.True or false: chalk powder does not dissolve in water. (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: the amount of water is the one thing we change. (a) True (b) False
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) a magnet (d) turmeric powder
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a shallow dish (d) a battery cell
38. 38.True or false: melting butter is a change that cannot be undone. (a) False (b) True
39. 39.True or false: warm water is needed for growing salt crystals. (a) True (b) False
40. 40.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to make it very salty (d) to cool the water

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