Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 805 · 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.🛟 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
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 keep it the same (b) we measure it (c) we change it
3. 3.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
5. 5.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) browning lemon ink (c) freezing water (d) dissolving salt
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a balloon
8. 8.True or false: rusting iron is a change that can be undone. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) glucose powder (d) chalk powder
10. 10.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
12. 12.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
13. 13.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a spoon (d) a mirror
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
16. 16.True or false: cooking oil dissolves in water. (a) False (b) True
17. 17.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) dissolving salt (d) melting ice
18. 18.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
19. 19.⚖️ 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) the kind of salt (d) days to see crystals
20. 20.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
21. 21.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
22. 22.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
23. 23.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) baking a cake (d) freezing water
24. 24.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
25. 25.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) salt (c) a balloon (d) yeast
29. 29.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
30. 30.True or false: melting butter is a change that can be undone. (a) False (b) True
31. 31.⚖️ 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 water (b) days to see crystals (c) the amount of salt (d) sunny or shady place
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a piece of string (d) a magnet
33. 33.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) magnetic (d) frozen
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
35. 35.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) turmeric powder (d) warm water
37. 37.⚖️ 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) True (b) False
38. 38.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt grows roots (d) salt eats water
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a spoon (c) turmeric powder (d) a battery cell
40. 40.⚖️ 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 water (b) days to see crystals (c) sunny or shady place

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