Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 606 · 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.⚖️ 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 measure it (b) we change it (c) we keep it the same
2. 2.True or false: table salt does not dissolve in water. (a) False (b) True
3. 3.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) food colour (d) cooking oil
4. 4.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
5. 5.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
6. 6.True or false: sawdust dissolves in water. (a) False (b) True
7. 7.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
8. 8.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) dissolving salt (d) melting butter
9. 9.True or false: folding paper is a change that cannot be undone. (a) True (b) False
10. 10.🧂 Which of these does not dissolve in water? (a) food colour (b) cooking oil (c) table salt (d) sugar
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
13. 13.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
14. 14.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) table salt (d) sand
15. 15.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
16. 16.True or false: yeast is needed for growing salt crystals. (a) False (b) True
17. 17.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
18. 18.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) dissolving salt (d) baking a cake
20. 20.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
21. 21.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) sand (d) sawdust
22. 22.🧂 Which of these does not dissolve in water? (a) food colour (b) chalk powder (c) table salt (d) sugar
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
25. 25.⚖️ 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) False (b) True
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) a spoon (d) a shallow dish
27. 27.⚖️ 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
28. 28.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
29. 29.True or false: cooking an egg is a change that can be undone. (a) True (b) False
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) a battery cell
31. 31.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
32. 32.True or false: cooking oil dissolves in water. (a) False (b) True
33. 33.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the same dish
35. 35.True or false: chalk powder does not dissolve in water. (a) False (b) True
36. 36.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a shallow dish (d) a magnet
38. 38.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) baking soda (d) sand
39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
40. 40.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone

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