Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 252 · 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 “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a balloon (d) a shallow dish
3. 3.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) glucose powder (d) food colour
4. 4.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
6. 6.🧂 Which of these dissolves in water? (a) baking soda (b) sawdust (c) small pebbles (d) chalk powder
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.⚖️ 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 change it (b) we measure it (c) we keep it the same
9. 9.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
10. 10.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) freezing water (d) rusting iron
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a spoon (d) a shallow dish
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) warm water (d) a piece of string
13. 13.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) freezing water (d) milk turning to curd
14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.True or false: salt is not needed for growing salt crystals. (a) True (b) False
17. 17.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
18. 18.True or false: sawdust does not dissolve in water. (a) False (b) True
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) the same dish (d) the kind of salt
20. 20.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
21. 21.⚖️ 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
22. 22.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
23. 23.⚖️ 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
24. 24.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
25. 25.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
26. 26.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.⚖️ 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 keep it the same (c) we measure it
28. 28.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) rusting iron (d) melting ice
29. 29.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) cooking an egg (d) rusting iron
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) warm water (d) salt
31. 31.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) sand (d) cooking oil
32. 32.True or false: table salt does not dissolve in water. (a) True (b) False
33. 33.True or false: dissolving salt is a change that can be undone. (a) False (b) True
34. 34.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) warm water (c) a mirror (d) a magnet
36. 36.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
37. 37.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) small pebbles (d) food colour
38. 38.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) browning lemon ink (c) melting ice (d) freezing water
39. 39.True or false: sugar does not dissolve in water. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) cooking oil (d) food colour

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