Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 246 · 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) sugar (b) food colour (c) sand (d) glucose powder
2. 2.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
3. 3.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a shallow dish (c) a magnet (d) a battery cell
4. 4.⚖️ 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 kind of salt (b) the same dish (c) days to see crystals (d) sunny or shady place
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a shallow dish (d) turmeric powder
6. 6.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) glucose powder (d) cooking oil
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
8. 8.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
9. 9.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
10. 10.⚖️ 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
11. 11.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
12. 12.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) cooking an egg (d) folding paper
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) the same dish (c) sunny or shady place (d) days to see crystals
14. 14.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a balloon (d) warm water
16. 16.⚖️ 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 keep it the same (c) we change it
17. 17.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
18. 18.⚖️ 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
19. 19.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) small pebbles (d) table salt
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
21. 21.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
22. 22.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
23. 23.🔍 Which is the odd one out? (a) baking soda (b) small pebbles (c) table salt (d) glucose powder
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a mirror (d) salt
25. 25.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
26. 26.⚖️ 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
27. 27.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) cooking oil (d) table salt
28. 28.True or false: cooking oil dissolves in water. (a) False (b) True
29. 29.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
30. 30.⚖️ 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 amount of water
31. 31.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
33. 33.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) chalk powder (d) table salt
34. 34.⚖️ 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) True (b) False
35. 35.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a spoon (c) a shallow dish (d) salt
37. 37.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
38. 38.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
40. 40.True or false: cooking an egg is a change that can be undone. (a) True (b) False

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