Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 217 · 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.True or false: baking soda dissolves in water. (a) False (b) True
2. 2.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
4. 4.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) sand (d) chalk powder
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
7. 7.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) salt (d) a balloon
9. 9.True or false: rusting iron is a change that can be undone. (a) True (b) False
10. 10.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
11. 11.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) cooking oil (d) sand
12. 12.True or false: melting ice is a change that cannot be undone. (a) False (b) True
13. 13.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) folding paper (d) melting butter
14. 14.⚖️ 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 same dish (b) days to see crystals (c) the amount of salt (d) sunny or shady place
15. 15.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) rusting iron (d) freezing water
16. 16.🧂 Which of these dissolves in water? (a) chalk powder (b) glucose powder (c) sand (d) small pebbles
17. 17.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
18. 18.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) melting ice (d) milk turning to curd
19. 19.⚖️ 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
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
21. 21.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) warm water (d) a battery cell
23. 23.True or false: sawdust does not dissolve in water. (a) True (b) False
24. 24.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
25. 25.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
26. 26.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
28. 28.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) dissolving salt (d) browning lemon ink
29. 29.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) warm water (c) a battery cell (d) a mirror
31. 31.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
32. 32.🛟 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
33. 33.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) sugar (d) chalk powder
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a battery cell (d) warm water
35. 35.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) baking soda (d) sawdust
37. 37.True or false: glucose powder does not dissolve in water. (a) True (b) False
38. 38.⚖️ 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
39. 39.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a shallow dish (d) a piece of string

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