Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 741 · 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.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) sugar (d) baking soda
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 change it (b) we measure it (c) we keep it the same
3. 3.True or false: cooking oil does not dissolve in water. (a) False (b) True
4. 4.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
5. 5.⚖️ 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
6. 6.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) food colour (d) sand
8. 8.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
9. 9.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) folding paper (d) browning lemon ink
10. 10.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
11. 11.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) sand (d) small pebbles
12. 12.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.⚖️ 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
14. 14.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
15. 15.True or false: glucose powder dissolves in water. (a) True (b) False
16. 16.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
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) sunny or shady place (c) the kind of salt
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
22. 22.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
23. 23.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) glucose powder (d) small pebbles
24. 24.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
25. 25.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
26. 26.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a magnet (d) a spoon
29. 29.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) table salt (d) cooking oil
30. 30.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a piece of string (c) warm water (d) salt
32. 32.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
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) sunny or shady place (b) the amount of water (c) days to see crystals
34. 34.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) the amount of salt (c) sunny or shady place (d) the kind of salt
37. 37.True or false: table salt does not dissolve in water. (a) True (b) False
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a battery cell (d) a spoon
39. 39.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed

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