Salt Crystal Experiment Worksheet

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

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