Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 668 · 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.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
2. 2.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) glucose powder (d) baking soda
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.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a shallow dish (d) yeast
5. 5.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
8. 8.⚖️ 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) False (b) True
9. 9.True or false: table salt dissolves in water. (a) False (b) True
10. 10.True or false: cooking oil dissolves in water. (a) False (b) True
11. 11.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a mirror (d) a piece of string
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a piece of string (d) a balloon
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
15. 15.True or false: glucose powder does not dissolve in water. (a) False (b) True
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the same dish
18. 18.⚖️ 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 change it (c) we measure it
19. 19.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) folding paper (d) milk turning to curd
20. 20.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.⚖️ 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
22. 22.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a piece of string (c) a magnet (d) a balloon
23. 23.True or false: melting butter is a change that can be undone. (a) True (b) False
24. 24.⚖️ 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 same dish (b) the amount of salt (c) the kind of salt (d) days to see crystals
25. 25.⚖️ 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 change it (b) we keep it the same (c) we measure it
26. 26.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) browning lemon ink (d) freezing water
27. 27.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) melting butter (d) browning lemon ink
28. 28.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
29. 29.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
30. 30.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
31. 31.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) sugar (d) sand
32. 32.True or false: freezing water is a change that cannot be undone. (a) False (b) True
33. 33.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
34. 34.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
35. 35.🧺 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 magnet
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a piece of string (d) yeast
37. 37.⚖️ 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 change it (c) we measure it
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a shallow dish (d) a battery cell
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a spoon (d) a magnet
40. 40.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve

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