Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 207 · 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.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
2. 2.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) food colour (d) sand
3. 3.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a mirror (c) a spoon (d) a magnet
4. 4.True or false: freezing water is a change that cannot be undone. (a) False (b) True
5. 5.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
8. 8.True or false: table salt does not dissolve in water. (a) True (b) False
9. 9.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) turmeric powder (d) warm water
10. 10.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
11. 11.🧂 Which of these dissolves in water? (a) glucose powder (b) chalk powder (c) cooking oil (d) small pebbles
12. 12.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
13. 13.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
14. 14.True or false: food colour does not dissolve in water. (a) False (b) True
15. 15.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
16. 16.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a shallow dish (d) salt
18. 18.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) table salt (d) sugar
19. 19.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
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.⚖️ 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 salt (c) sunny or shady place (d) the same dish
23. 23.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) sugar (d) cooking oil
24. 24.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
26. 26.⚖️ 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 keep it the same (c) we measure it
27. 27.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) milk turning to curd (d) rusting iron
28. 28.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a piece of string (d) a spoon
31. 31.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.True or false: food colour dissolves in water. (a) False (b) True
33. 33.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
34. 34.⚖️ 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) the kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of water
35. 35.True or false: sawdust dissolves in water. (a) False (b) True
36. 36.🧂 Which of these dissolves in water? (a) table salt (b) chalk powder (c) cooking oil (d) sawdust
37. 37.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) baking a cake (d) melting ice
38. 38.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
39. 39.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) glucose powder (d) baking soda
40. 40.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone

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