Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 604 · 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) table salt (b) sand (c) sugar (d) baking soda
2. 2.⚖️ 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 same dish (c) the amount of water (d) the kind of salt
3. 3.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
4. 4.True or false: melting ice is a change that cannot be undone. (a) False (b) True
5. 5.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a piece of string (d) a mirror
10. 10.True or false: yeast is needed for growing salt crystals. (a) False (b) True
11. 11.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) sand (d) glucose powder
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
13. 13.True or false: sawdust dissolves in water. (a) False (b) True
14. 14.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) dissolving salt (c) melting ice (d) freezing water
15. 15.True or false: melting ice is a change that can be undone. (a) True (b) False
16. 16.True or false: folding paper is a change that can be undone. (a) False (b) True
17. 17.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
19. 19.🧂 Which of these dissolves in water? (a) baking soda (b) small pebbles (c) sand (d) sawdust
20. 20.⚖️ 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 change it (c) we keep it the same
21. 21.🛟 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
22. 22.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) cooking oil (d) glucose powder
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a spoon (d) a piece of string
24. 24.⚖️ 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
25. 25.🧺 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 battery cell
26. 26.True or false: freezing water is a change that can be undone. (a) True (b) False
27. 27.⚖️ 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) False (b) True
28. 28.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
29. 29.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a magnet (d) a battery cell
30. 30.True or false: warm water is needed for growing salt crystals. (a) True (b) False
31. 31.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) dissolving salt (d) rusting iron
32. 32.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) warm water (c) a magnet (d) turmeric powder
33. 33.True or false: folding paper is a change that cannot be undone. (a) False (b) True
34. 34.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) yeast (d) a spoon
37. 37.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) melting butter (d) cooking an egg
38. 38.🧈 Which of these is a change that can be undone? (a) baking a cake (b) folding paper (c) rusting iron (d) milk turning to curd
39. 39.True or false: food colour dissolves in water. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) baking soda (b) small pebbles (c) food colour (d) table salt

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