Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 738 · 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 dissolves in water? (a) chalk powder (b) small pebbles (c) table salt (d) sawdust
2. 2.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sawdust (d) food colour
3. 3.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) browning lemon ink (d) melting butter
4. 4.🧺 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
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a piece of string (d) a magnet
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
7. 7.True or false: chalk powder dissolves in water. (a) True (b) False
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 kept the same. (a) False (b) True
9. 9.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.True or false: dissolving salt is a change that can be undone. (a) False (b) True
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
13. 13.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a piece of string (d) a magnet
15. 15.⚖️ 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 keep it the same (c) we change it
16. 16.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: freezing water is a change that cannot be undone. (a) False (b) True
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the kind of salt (b) days to see crystals (c) the same dish (d) the amount of water
22. 22.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) dissolving salt (d) melting ice
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
24. 24.True or false: rusting iron is a change that can be undone. (a) False (b) True
25. 25.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) cooking oil (d) glucose powder
26. 26.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
27. 27.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) sawdust (d) baking soda
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a balloon (d) a piece of string
29. 29.True or false: sugar dissolves in water. (a) True (b) False
30. 30.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
32. 32.True or false: glucose powder does not dissolve in water. (a) True (b) False
33. 33.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
34. 34.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) food colour (d) small pebbles
35. 35.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
36. 36.🔮 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
37. 37.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) freezing water (d) melting ice
38. 38.True or false: salt is needed for growing salt crystals. (a) False (b) True
39. 39.⚖️ 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 measure it (c) we keep it the same
40. 40.True or false: melting ice is a change that cannot be undone. (a) False (b) True

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