Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 540 · 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) small pebbles (b) cooking oil (c) food colour (d) chalk powder
2. 2.⚖️ 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
3. 3.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
4. 4.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
5. 5.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
6. 6.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.⚖️ 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 amount of water (b) the amount of salt (c) sunny or shady place (d) the kind of salt
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of salt (c) the amount of water (d) days to see crystals
9. 9.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
10. 10.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
12. 12.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) a battery cell (d) a spoon
13. 13.🧂 Which of these dissolves in water? (a) cooking oil (b) table salt (c) sawdust (d) chalk powder
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
15. 15.True or false: sand dissolves in water. (a) False (b) True
16. 16.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) melting butter (d) browning lemon ink
17. 17.⚖️ 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
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
20. 20.True or false: melting butter is a change that can be undone. (a) False (b) True
21. 21.True or false: baking soda does not dissolve in water. (a) False (b) True
22. 22.🛟 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
23. 23.🧂 Which of these does not dissolve in water? (a) cooking oil (b) glucose powder (c) sugar (d) food colour
24. 24.⚖️ 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
25. 25.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
26. 26.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) sugar (d) chalk powder
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) turmeric powder (d) a spoon
29. 29.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
30. 30.True or false: cooking an egg is a change that can be undone. (a) True (b) False
31. 31.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
32. 32.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
34. 34.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
35. 35.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) magnetic (d) empty
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.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
39. 39.True or false: salt is not needed for growing salt crystals. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) table salt (d) sand

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