Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 714 · 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.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) rusting iron (d) cooking an egg
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (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 same dish”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) salt (d) a balloon
9. 9.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) small pebbles (d) glucose powder
10. 10.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) dissolving salt (d) melting ice
11. 11.True or false: salt is needed for growing salt crystals. (a) True (b) False
12. 12.True or false: dissolving salt is a change that can be undone. (a) True (b) False
13. 13.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
14. 14.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to cool the water (d) to make it fizz
15. 15.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
16. 16.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
17. 17.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) melting ice (d) baking a cake
18. 18.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🔍 Which is the odd one out? (a) sand (b) sawdust (c) glucose powder (d) chalk powder
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a piece of string (d) turmeric powder
23. 23.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
24. 24.⚖️ 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
25. 25.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
26. 26.⚖️ 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 kind of salt (c) days to see crystals (d) sunny or shady place
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
28. 28.⚖️ 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
29. 29.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
30. 30.🔍 Which is the odd one out? (a) table salt (b) sand (c) baking soda (d) food colour
31. 31.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) sugar
32. 32.⚖️ 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 change it (c) we measure it
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a spoon (c) a mirror (d) turmeric powder
34. 34.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) baking a cake (d) cooking an egg
35. 35.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.True or false: table salt dissolves in water. (a) True (b) False
37. 37.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
38. 38.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
39. 39.🧂 Which of these does not dissolve in water? (a) sawdust (b) food colour (c) baking soda (d) glucose powder
40. 40.True or false: a balloon is needed for growing salt crystals. (a) True (b) False

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