Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 970 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) a spoon (d) salt
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) a magnet
3. 3.True or false: freezing water is a change that cannot be undone. (a) False (b) True
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
5. 5.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
6. 6.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
7. 7.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
8. 8.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) browning lemon ink (d) freezing water
9. 9.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) salt (d) a piece of string
11. 11.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sugar (d) table salt
12. 12.True or false: sand does not dissolve in water. (a) False (b) True
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) warm water (d) salt
14. 14.True or false: table salt dissolves in water. (a) False (b) True
15. 15.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
16. 16.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) food colour (d) sand
17. 17.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sugar (d) sawdust
18. 18.⚖️ 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 salt (c) sunny or shady place
19. 19.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
20. 20.⚖️ 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) True (b) False
21. 21.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
22. 22.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) sand is ground up (d) fish make it
23. 23.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) baking a cake (d) dissolving salt
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
26. 26.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
27. 27.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) baking a cake (c) milk turning to curd (d) cooking an egg
28. 28.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
30. 30.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
31. 31.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
32. 32.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
33. 33.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
34. 34.True or false: baking a cake is a change that can be undone. (a) True (b) False
35. 35.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) table salt (d) cooking oil
36. 36.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) rusting iron (d) melting butter
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.⚖️ 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
39. 39.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone

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