Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 642 · 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) freezing water (b) milk turning to curd (c) baking a cake (d) cooking an egg
2. 2.⚖️ 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 keep it the same (c) we measure it
3. 3.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) table salt (d) small pebbles
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) a mirror
5. 5.⚖️ 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
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
8. 8.🧂 Which of these does not dissolve in water? (a) table salt (b) sand (c) sugar (d) food colour
9. 9.🔍 Which is the odd one out? (a) sugar (b) food colour (c) baking soda (d) chalk powder
10. 10.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
11. 11.⚖️ 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) the amount of salt (c) days to see crystals
12. 12.⚖️ 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
13. 13.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
14. 14.True or false: freezing water is a change that cannot be undone. (a) False (b) True
15. 15.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) baking a cake (c) melting butter (d) melting ice
16. 16.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) salt (d) turmeric powder
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a battery cell (d) warm water
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
20. 20.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
22. 22.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
23. 23.⚖️ 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
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) a spoon (d) turmeric powder
25. 25.⚖️ 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) the kind of salt
26. 26.⚖️ 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 kind of salt (c) sunny or shady place
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
28. 28.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
29. 29.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
30. 30.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) baking soda (d) table salt
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) a spoon (d) a shallow dish
32. 32.⚖️ 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) the same dish (b) the amount of salt (c) sunny or shady place (d) the amount of water
33. 33.True or false: cooking an egg is a change that can be undone. (a) True (b) False
34. 34.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.True or false: sawdust dissolves in water. (a) False (b) True
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a mirror (c) a piece of string (d) warm water
37. 37.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.⚖️ 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
39. 39.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) folding paper (d) rusting iron
40. 40.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) milk turning to curd (d) freezing water

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