Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 133 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) sunny or shady place (c) days to see crystals
2. 2.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) sugar (d) table salt
5. 5.⚖️ 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) True (b) False
6. 6.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) fish make it (d) salt rains down
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) sawdust (d) table salt
8. 8.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.True or false: sugar does not dissolve in water. (a) False (b) True
10. 10.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) rusting iron (d) dissolving salt
11. 11.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) salt (d) turmeric powder
12. 12.True or false: melting butter is a change that cannot be undone. (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 “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
15. 15.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) melting butter (d) baking a cake
16. 16.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
17. 17.⚖️ 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 kind of salt
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to make it fizz (d) to cool the water
19. 19.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) a mirror (d) a magnet
21. 21.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
22. 22.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) folding paper (d) dissolving salt
23. 23.True or false: yeast is needed for growing salt crystals. (a) False (b) True
24. 24.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
25. 25.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
26. 26.True or false: freezing water is a change that can be undone. (a) True (b) False
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) warm water (d) a battery cell
28. 28.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) cooking oil (d) glucose powder
29. 29.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) baking a cake (d) freezing water
30. 30.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
31. 31.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
32. 32.🔍 Which is the odd one out? (a) table salt (b) food colour (c) sand (d) glucose powder
33. 33.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
34. 34.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) sand (d) food colour
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
36. 36.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) cooking an egg (d) dissolving salt
37. 37.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
38. 38.⚖️ 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
39. 39.True or false: baking soda dissolves in water. (a) False (b) True
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a shallow dish (d) a mirror

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