Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 530 · 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 piece of string (b) salt (c) warm water (d) a mirror
2. 2.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sand (d) sugar
4. 4.True or false: salt is needed for growing salt crystals. (a) False (b) True
5. 5.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
6. 6.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
7. 7.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
8. 8.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
9. 9.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) freezing water (c) folding paper (d) dissolving salt
11. 11.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.🔍 Which is the odd one out? (a) sugar (b) sand (c) small pebbles (d) sawdust
13. 13.True or false: melting butter is a change that can be undone. (a) True (b) False
14. 14.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
15. 15.⚖️ 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 amount of salt (b) days to see crystals (c) the amount of water (d) sunny or shady place
16. 16.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sawdust (d) sugar
17. 17.🧈 Which of these is a change that can be undone? (a) freezing water (b) milk turning to curd (c) browning lemon ink (d) rusting iron
18. 18.⚖️ 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) False (b) True
19. 19.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) milk turning to curd (d) melting ice
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
21. 21.⚖️ 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) False (b) True
22. 22.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
23. 23.True or false: melting butter is a change that cannot be undone. (a) True (b) False
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) a shallow dish (d) salt
25. 25.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
26. 26.⚖️ 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 measure it (b) we keep it the same (c) we change it
27. 27.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) dissolving salt (c) freezing water (d) melting butter
28. 28.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a spoon (d) a magnet
30. 30.⚖️ 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
31. 31.True or false: yeast is needed for growing salt crystals. (a) False (b) True
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) turmeric powder (c) a spoon (d) a magnet
33. 33.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
34. 34.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
35. 35.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
36. 36.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
37. 37.True or false: sawdust dissolves in water. (a) True (b) False
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) days to see crystals (b) the amount of salt (c) sunny or shady place
39. 39.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
40. 40.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) sand (d) food colour

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