Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 304 · 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.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) salt crystals form (d) it turns to oil
2. 2.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) turmeric powder (d) a magnet
4. 4.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
5. 5.⚖️ 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
6. 6.True or false: freezing water is a change that can be undone. (a) True (b) False
7. 7.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
8. 8.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a battery cell (d) warm water
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) a balloon
10. 10.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) table salt (d) small pebbles
11. 11.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
12. 12.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
13. 13.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) glucose powder (d) chalk powder
14. 14.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) melting ice (d) milk turning to curd
15. 15.⚖️ 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
16. 16.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
17. 17.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
18. 18.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.True or false: freezing water is a change that cannot be undone. (a) False (b) True
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) salt (d) turmeric powder
21. 21.True or false: folding paper is a change that cannot be undone. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sugar (d) sand
23. 23.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) warm water (d) a piece of string
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) salt (c) a spoon (d) a piece of string
26. 26.True or false: food colour dissolves in water. (a) False (b) True
27. 27.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
28. 28.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) sand (d) baking soda
29. 29.⚖️ 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
30. 30.⚖️ 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 amount of salt (b) the kind of salt (c) the amount of water (d) days to see crystals
31. 31.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
32. 32.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) sawdust (d) table salt
33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
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) the kind of salt (b) days to see crystals (c) sunny or shady place
35. 35.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
36. 36.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
38. 38.True or false: baking a cake is a change that cannot be undone. (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 “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) salt (c) a piece of string (d) a shallow dish

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