Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 282 · 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 dissolves in water? (a) sugar (b) small pebbles (c) sand (d) cooking oil
2. 2.⚖️ 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 measure it (b) we keep it the same (c) we change it
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a balloon (d) a piece of string
4. 4.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) salt rains down (d) sand is ground up
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a piece of string (d) warm water
7. 7.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
8. 8.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
9. 9.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) folding paper (d) baking a cake
10. 10.⚖️ 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
11. 11.⚖️ 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 change it (b) we keep it the same (c) we measure it
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
13. 13.True or false: baking a cake is a change that can be undone. (a) False (b) True
14. 14.True or false: chalk powder does not dissolve in water. (a) True (b) False
15. 15.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) baking soda (d) cooking oil
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) cooking an egg (d) rusting iron
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
19. 19.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
22. 22.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
23. 23.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
25. 25.True or false: melting butter is a change that can be undone. (a) False (b) True
26. 26.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
27. 27.🧂 Which of these dissolves in water? (a) food colour (b) sawdust (c) cooking oil (d) sand
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
29. 29.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
30. 30.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
31. 31.⚖️ 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
32. 32.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) cooking oil (d) sawdust
33. 33.⚖️ 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
34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
35. 35.True or false: rusting iron is a change that can be undone. (a) False (b) True
36. 36.⚖️ 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) False (b) True
37. 37.True or false: small pebbles dissolves in water. (a) True (b) False
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) warm water (d) turmeric powder
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
40. 40.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sugar (d) small pebbles

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