Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 259 · 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: freezing water? (a) can be undone (b) cannot be undone
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
4. 4.⚖️ 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) True (b) False
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
6. 6.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
8. 8.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) melting ice (d) folding paper
9. 9.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
10. 10.True or false: small pebbles does not dissolve in water. (a) False (b) True
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) a magnet
12. 12.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
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 amount of water (b) the kind of salt (c) the amount of salt (d) sunny or shady place
15. 15.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
16. 16.True or false: freezing water is a change that can be undone. (a) False (b) True
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a piece of string (d) turmeric powder
18. 18.True or false: sugar dissolves in water. (a) True (b) False
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
20. 20.⚖️ 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
21. 21.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
22. 22.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
23. 23.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
24. 24.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
25. 25.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) cooking an egg (c) rusting iron (d) baking a cake
26. 26.True or false: chalk powder dissolves in water. (a) False (b) True
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
28. 28.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
29. 29.⚖️ 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) False (b) True
30. 30.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.⚖️ 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
32. 32.⚖️ 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 measure it (c) we keep it the same
33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
34. 34.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sawdust (d) sugar
35. 35.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) dissolving salt (c) melting butter (d) melting ice
36. 36.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
37. 37.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) salt (d) a piece of string
39. 39.True or false: baking soda dissolves in water. (a) True (b) False
40. 40.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic

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