Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 565 · 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 is a change that cannot be undone? (a) rusting iron (b) freezing water (c) melting butter (d) melting ice
2. 2.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) table salt (d) glucose powder
3. 3.⚖️ 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) False (b) True
4. 4.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) melting butter (d) folding paper
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
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: dissolving salt is a change that can be undone. (a) True (b) False
8. 8.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) freezing water (d) milk turning to curd
9. 9.⚖️ 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) sunny or shady place (b) the kind of salt (c) days to see crystals (d) the amount of water
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
11. 11.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
12. 12.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
14. 14.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
15. 15.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
16. 16.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
19. 19.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) rusting iron (d) dissolving salt
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a spoon (d) a battery cell
21. 21.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
22. 22.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
23. 23.🧂 Which of these dissolves in water? (a) food colour (b) sand (c) chalk powder (d) small pebbles
24. 24.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) melting butter (d) cooking an egg
25. 25.⚖️ 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 salt (b) days to see crystals (c) sunny or shady place
26. 26.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
28. 28.True or false: sand does not dissolve in water. (a) False (b) True
29. 29.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) dissolving salt (c) freezing water (d) melting butter
30. 30.🛟 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
31. 31.True or false: yeast is needed for growing salt crystals. (a) True (b) False
32. 32.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
34. 34.True or false: small pebbles does not dissolve in water. (a) True (b) False
35. 35.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a shallow dish (d) a magnet
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: chalk powder does not dissolve in water. (a) True (b) False
39. 39.True or false: melting butter is a change that cannot be undone. (a) False (b) True
40. 40.⚖️ 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 measure it (c) we keep it the same

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