Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 198 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
2. 2.⚖️ 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 water (b) the amount of salt (c) days to see crystals (d) sunny or shady place
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a battery cell (d) warm water
4. 4.🧂 Which of these does not dissolve in water? (a) food colour (b) chalk powder (c) sugar (d) baking soda
5. 5.⚖️ 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) the amount of salt (c) sunny or shady place
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) cooking an egg (d) browning lemon ink
9. 9.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) baking a cake (d) melting butter
11. 11.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
12. 12.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) dissolving salt (c) melting ice (d) freezing water
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) a piece of string (d) turmeric powder
15. 15.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) browning lemon ink (d) freezing water
16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
17. 17.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) a spoon (d) a piece of string
20. 20.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
21. 21.⚖️ 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 measure it (b) we keep it the same (c) we change it
22. 22.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
23. 23.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
24. 24.🔮 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
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a piece of string (d) a battery cell
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) turmeric powder
27. 27.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
28. 28.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.True or false: melting butter is a change that cannot be undone. (a) True (b) False
31. 31.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
32. 32.True or false: yeast is needed for growing salt crystals. (a) True (b) False
33. 33.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
35. 35.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
36. 36.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) sawdust (d) glucose powder
37. 37.True or false: food colour dissolves in water. (a) False (b) True
38. 38.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) folding paper (d) baking a cake
39. 39.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ 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

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