Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 421 · 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.True or false: food colour dissolves in water. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) sawdust (d) sugar
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
5. 5.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) sand (d) glucose powder
6. 6.⚖️ 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 same dish (c) the amount of salt (d) sunny or shady place
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a shallow dish (d) a balloon
8. 8.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) milk turning to curd (d) folding paper
9. 9.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) freezing water (d) browning lemon ink
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) yeast
11. 11.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
12. 12.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) salt (c) a shallow dish (d) warm water
14. 14.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) glucose powder (d) sand
15. 15.⚖️ 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 water (c) the amount of salt (d) days to see crystals
16. 16.🧂 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) baking soda (d) food colour
17. 17.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) cooking an egg (d) freezing water
18. 18.⚖️ 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
19. 19.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
20. 20.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) milk turning to curd (d) baking a cake
21. 21.⚖️ 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
22. 22.🧂 Which of these does not dissolve in water? (a) small pebbles (b) sugar (c) food colour (d) table salt
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a shallow dish (c) salt (d) a spoon
24. 24.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) table salt (d) cooking oil
25. 25.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) salt grows roots (d) the dish melts
26. 26.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
27. 27.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sugar (d) sawdust
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
29. 29.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) baking soda (d) small pebbles
30. 30.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
31. 31.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a spoon (d) salt
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a shallow dish (d) a piece of string
34. 34.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) baking soda (d) table salt
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) warm water (d) a shallow dish
36. 36.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
37. 37.True or false: table salt does not dissolve in water. (a) True (b) False
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
39. 39.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
40. 40.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True

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