Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 156 · 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.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
2. 2.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) sawdust (d) sand
3. 3.True or false: cooking oil dissolves in water. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) sand (b) food colour (c) table salt (d) baking soda
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) rusting iron
6. 6.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.⚖️ 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 same dish (b) the amount of salt (c) the kind of salt (d) days to see crystals
8. 8.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.True or false: table salt dissolves in water. (a) False (b) True
10. 10.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) baking soda (d) cooking oil
12. 12.⚖️ 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
13. 13.True or false: melting ice is a change that cannot be undone. (a) False (b) True
14. 14.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
15. 15.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
16. 16.⚖️ 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 measure it (c) we change it
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) a shallow dish (d) a piece of string
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
19. 19.🧂 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) food colour (d) glucose powder
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) yeast (d) turmeric powder
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a mirror (d) a spoon
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a battery cell (d) a spoon
23. 23.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
24. 24.⚖️ 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 change it (b) we measure it (c) we keep it the same
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
26. 26.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.⚖️ 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 salt (c) days to see crystals
28. 28.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) baking a cake (d) melting butter
30. 30.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of water (c) sunny or shady place
34. 34.True or false: salt is not needed for growing salt crystals. (a) True (b) False
35. 35.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
36. 36.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) sawdust (d) sand
38. 38.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) cooking an egg (d) rusting iron
39. 39.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
40. 40.True or false: sawdust dissolves in water. (a) True (b) False

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