Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 556 · 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 is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) browning lemon ink (d) freezing water
2. 2.⚖️ 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 amount of salt (b) the amount of water (c) the kind of salt (d) sunny or shady place
3. 3.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
6. 6.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) melting butter (d) melting ice
7. 7.🧂 Which of these dissolves in water? (a) food colour (b) cooking oil (c) small pebbles (d) sand
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a mirror (d) salt
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
10. 10.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) salt (c) a battery cell (d) yeast
11. 11.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) a shallow dish (d) salt
13. 13.True or false: glucose powder does not dissolve in water. (a) False (b) True
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) warm water (d) a spoon
15. 15.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
16. 16.True or false: cooking oil does not dissolve in water. (a) False (b) True
17. 17.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) days to see crystals (c) sunny or shady place
20. 20.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
21. 21.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
22. 22.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
23. 23.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
24. 24.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
25. 25.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.⚖️ 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) True (b) False
27. 27.⚖️ 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) False (b) True
28. 28.True or false: cooking oil dissolves in water. (a) True (b) False
29. 29.⚖️ 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
30. 30.True or false: sawdust dissolves in water. (a) False (b) True
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a shallow dish (d) yeast
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) glucose powder (d) sawdust
34. 34.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) turmeric powder (c) salt (d) warm water
37. 37.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) turmeric powder (c) salt (d) a shallow dish
39. 39.True or false: melting ice is a change that cannot be undone. (a) True (b) False
40. 40.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet

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