Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 572 · 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? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a balloon (c) warm water (d) a piece of string
4. 4.True or false: glucose powder does not dissolve in water. (a) False (b) True
5. 5.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
6. 6.True or false: table salt does not dissolve in water. (a) False (b) True
7. 7.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) food colour (d) sand
8. 8.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) cooking oil (d) baking soda
9. 9.True or false: melting butter is a change that cannot be undone. (a) True (b) False
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a magnet (c) a battery cell (d) a mirror
11. 11.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
12. 12.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a magnet (c) a battery cell (d) yeast
15. 15.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) salt rains down (d) sea water evaporates
16. 16.⚖️ 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) False (b) True
17. 17.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.True or false: sand does not dissolve in water. (a) False (b) True
19. 19.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.⚖️ 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
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) warm water (d) a balloon
23. 23.⚖️ 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 same dish (c) days to see crystals (d) sunny or shady place
24. 24.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
26. 26.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) baking a cake (d) milk turning to curd
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.🔍 Which is the odd one out? (a) sugar (b) table salt (c) food colour (d) small pebbles
29. 29.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
30. 30.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) glucose powder (d) chalk powder
31. 31.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) sand (b) table salt (c) food colour (d) glucose powder
34. 34.True or false: food colour does not dissolve in water. (a) True (b) False
35. 35.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) a piece of string (d) warm water
37. 37.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
38. 38.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
39. 39.⚖️ 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) False (b) True
40. 40.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True

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