Salt Crystal Experiment Worksheet

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

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