Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 599 · 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.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.⚖️ 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 change it (c) we keep it the same
3. 3.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sand (d) sugar
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (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 “sunny or shady place”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.⚖️ 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) the same dish (b) sunny or shady place (c) the kind of salt (d) days to see crystals
7. 7.⚖️ 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
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) a piece of string (d) a shallow dish
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
10. 10.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sand (d) food colour
11. 11.True or false: salt is needed for growing salt crystals. (a) True (b) False
12. 12.🧂 Which of these does not dissolve in water? (a) sand (b) sugar (c) glucose powder (d) baking soda
13. 13.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
14. 14.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
15. 15.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) rusting iron (d) cooking an egg
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) turmeric powder (c) a shallow dish (d) warm water
17. 17.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a shallow dish (d) a piece of string
19. 19.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
20. 20.⚖️ 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
21. 21.True or false: sand does not dissolve in water. (a) False (b) True
22. 22.True or false: food colour does not dissolve in water. (a) True (b) False
23. 23.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
24. 24.True or false: small pebbles dissolves in water. (a) True (b) False
25. 25.⚖️ 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
26. 26.True or false: salt is not needed for growing salt crystals. (a) False (b) True
27. 27.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sawdust (d) table salt
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) warm water (d) a shallow dish
29. 29.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
30. 30.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
31. 31.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
32. 32.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) browning lemon ink (d) milk turning to curd
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) salt (c) yeast (d) a magnet
35. 35.⚖️ 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
36. 36.⚖️ 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 salt (c) days to see crystals
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
38. 38.True or false: table salt dissolves in water. (a) True (b) False
39. 39.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
40. 40.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) chalk powder (d) sawdust

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