Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 455 · 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.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
2. 2.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.⚖️ 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
4. 4.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a spoon (d) a mirror
6. 6.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
7. 7.True or false: yeast is needed for growing salt crystals. (a) True (b) False
8. 8.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
9. 9.True or false: melting ice is a change that cannot be undone. (a) False (b) True
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) freezing water (d) milk turning to curd
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a battery cell (c) a piece of string (d) a spoon
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
13. 13.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) melting butter (d) baking a cake
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
15. 15.True or false: melting butter is a change that cannot be undone. (a) True (b) False
16. 16.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
17. 17.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) table salt (d) sand
18. 18.⚖️ 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) days to see crystals (b) the amount of water (c) the same dish (d) sunny or shady place
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) salt (d) a mirror
21. 21.True or false: sugar dissolves in water. (a) True (b) False
22. 22.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.True or false: small pebbles dissolves in water. (a) False (b) True
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) yeast (d) a piece of string
26. 26.⚖️ 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) the amount of salt (c) the amount of water (d) days to see crystals
27. 27.True or false: food colour does not dissolve in water. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) chalk powder (d) baking soda
29. 29.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
30. 30.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
31. 31.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
32. 32.⚖️ 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) False (b) True
33. 33.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
34. 34.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) chalk powder (d) table salt
35. 35.⚖️ 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
36. 36.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) cooking oil (d) sugar
37. 37.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) browning lemon ink (c) folding paper (d) freezing water
38. 38.⚖️ 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
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a balloon (c) a shallow dish (d) a piece of string
40. 40.True or false: baking soda dissolves in water. (a) False (b) True

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