Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 958 · 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.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
3. 3.True or false: chalk powder does not dissolve in water. (a) True (b) False
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
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) True (b) False
7. 7.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
8. 8.🧂 Which of these does not dissolve in water? (a) glucose powder (b) cooking oil (c) baking soda (d) sugar
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a battery cell (d) a piece of string
10. 10.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
11. 11.⚖️ 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
12. 12.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a battery cell (d) salt
14. 14.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) glucose powder (d) food colour
15. 15.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
16. 16.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
17. 17.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) glucose powder (d) baking soda
18. 18.⚖️ 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 keep it the same (b) we change it (c) we measure it
19. 19.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) sugar (d) chalk powder
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 the one thing we change. (a) False (b) True
21. 21.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
22. 22.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
23. 23.⚖️ 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 change it (b) we keep it the same (c) we measure it
24. 24.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a shallow dish (d) yeast
26. 26.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
27. 27.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) cooking an egg (d) browning lemon ink
28. 28.⚖️ 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 change it (c) we measure it
29. 29.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) days to see crystals (d) the amount of water
31. 31.⚖️ 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
32. 32.True or false: salt is not needed for growing salt crystals. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) small pebbles (d) glucose powder
34. 34.⚖️ 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 kind of salt (b) days to see crystals (c) sunny or shady place
35. 35.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.True or false: cooking oil dissolves in water. (a) False (b) True
37. 37.⚖️ 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) days to see crystals (c) the amount of salt
38. 38.True or false: chalk powder dissolves in water. (a) True (b) False
39. 39.True or false: dissolving salt is a change that can be undone. (a) True (b) False
40. 40.🧂 Which of these dissolves in water? (a) sand (b) glucose powder (c) small pebbles (d) cooking oil

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