Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 711 · 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.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) salt (d) a shallow dish
3. 3.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
4. 4.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
5. 5.⚖️ 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 change it (c) we keep it the same
6. 6.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
7. 7.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
9. 9.⚖️ 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
10. 10.True or false: sand dissolves in water. (a) False (b) True
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
12. 12.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to cool the water (d) to make it very salty
13. 13.🧈 Which of these is a change that can be undone? (a) baking a cake (b) dissolving salt (c) milk turning to curd (d) browning lemon ink
14. 14.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) melting butter (d) melting ice
15. 15.⚖️ 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
16. 16.True or false: baking soda does not dissolve in water. (a) True (b) False
17. 17.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
18. 18.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
19. 19.True or false: yeast is needed for growing salt crystals. (a) True (b) False
20. 20.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
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 change it (c) we measure it
22. 22.⚖️ 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) sunny or shady place (b) the amount of water (c) days to see crystals (d) the amount of salt
23. 23.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
25. 25.⚖️ 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
26. 26.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a battery cell (d) salt
28. 28.True or false: melting ice is a change that cannot be undone. (a) False (b) True
29. 29.True or false: sugar dissolves in water. (a) True (b) False
30. 30.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
31. 31.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) magnetic (d) empty
32. 32.⚖️ 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 keep it the same (b) we change it (c) we measure it
33. 33.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
34. 34.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) chalk powder (d) sand
35. 35.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sand (d) table salt
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (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: sunny or shady place is the one thing we change. (a) True (b) False
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a mirror (d) a spoon
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) salt (c) a battery cell (d) a mirror

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