Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 12 · 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.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
2. 2.True or false: freezing water is a change that can be undone. (a) False (b) True
3. 3.⚖️ 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) days to see crystals (c) sunny or shady place (d) the same dish
4. 4.🧂 Which of these dissolves in water? (a) sawdust (b) food colour (c) chalk powder (d) small pebbles
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
7. 7.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.True or false: rusting iron is a change that can be undone. (a) False (b) True
9. 9.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
10. 10.⚖️ 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
11. 11.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
12. 12.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
13. 13.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
14. 14.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
15. 15.🧂 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
16. 16.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
17. 17.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
18. 18.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
20. 20.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
21. 21.True or false: dissolving salt is a change that can be undone. (a) True (b) False
22. 22.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a piece of string (c) a mirror (d) a magnet
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
24. 24.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
25. 25.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) a piece of string (d) salt
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) salt (d) a spoon
29. 29.⚖️ 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 change it (b) we keep it the same (c) we measure it
30. 30.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a piece of string (d) salt
33. 33.⚖️ 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
34. 34.🧂 Which of these does not dissolve in water? (a) small pebbles (b) sugar (c) food colour (d) glucose powder
35. 35.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) a magnet
37. 37.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) cooking an egg (d) dissolving salt
39. 39.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) chalk powder (d) glucose powder
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) yeast (d) salt

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