Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 449 · 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 “the kind of salt”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.True or false: rusting iron is a change that can be undone. (a) True (b) False
3. 3.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) small pebbles (d) baking soda
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
6. 6.True or false: melting butter is a change that can be undone. (a) False (b) True
7. 7.🧈 Which of these is a change that can be undone? (a) freezing water (b) milk turning to curd (c) rusting iron (d) cooking an egg
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 water”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.True or false: sawdust does not dissolve in water. (a) True (b) False
10. 10.⚖️ 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) True (b) False
11. 11.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
12. 12.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) table salt (d) food colour
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) salt (d) a magnet
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) a balloon
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a piece of string (d) a spoon
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a balloon (d) a mirror
17. 17.⚖️ 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 salt (c) sunny or shady place (d) the amount of water
18. 18.⚖️ 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 amount of salt (b) days to see crystals (c) sunny or shady place
19. 19.True or false: cooking an egg is a change that can be undone. (a) False (b) True
20. 20.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
21. 21.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) warm water (d) a battery cell
23. 23.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) small pebbles (d) glucose powder
24. 24.⚖️ 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) True (b) False
25. 25.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
27. 27.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) baking a cake (c) dissolving salt (d) melting butter
28. 28.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) dissolving salt (d) browning lemon ink
29. 29.🧂 Which of these does not dissolve in water? (a) food colour (b) cooking oil (c) sugar (d) baking soda
30. 30.🔍 Which is the odd one out? (a) sugar (b) food colour (c) glucose powder (d) sand
31. 31.True or false: table salt dissolves in water. (a) False (b) True
32. 32.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
33. 33.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) sand (d) sugar
34. 34.True or false: sawdust dissolves in water. (a) False (b) True
35. 35.⚖️ 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 keep it the same (c) we change it
36. 36.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) sand (d) sawdust
37. 37.True or false: melting ice is a change that can be undone. (a) False (b) True
38. 38.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
39. 39.True or false: glucose powder dissolves in water. (a) False (b) True
40. 40.True or false: sand does not dissolve in water. (a) True (b) False

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