Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 152 · 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) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
2. 2.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) sand (d) sugar
3. 3.True or false: cooking oil does not dissolve in water. (a) True (b) False
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) melting butter (d) melting ice
6. 6.True or false: melting ice is a change that cannot be undone. (a) False (b) True
7. 7.⚖️ 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) False (b) True
8. 8.True or false: sugar does not dissolve in water. (a) False (b) True
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) yeast (c) a piece of string (d) a shallow dish
10. 10.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
11. 11.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a magnet (d) warm water
14. 14.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
15. 15.⚖️ 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) False (b) True
16. 16.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) browning lemon ink (c) freezing water (d) melting ice
17. 17.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
18. 18.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
19. 19.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
20. 20.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) yeast (d) salt
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) warm water (d) salt
23. 23.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
24. 24.True or false: freezing water is a change that cannot be undone. (a) True (b) False
25. 25.True or false: sawdust does not dissolve in water. (a) False (b) True
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
29. 29.True or false: baking soda dissolves in water. (a) True (b) False
30. 30.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) freezing water (d) melting butter
31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny spheres (d) tiny stars
32. 32.⚖️ 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 same dish (c) days to see crystals
33. 33.⚖️ 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
34. 34.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
35. 35.True or false: melting ice is a change that can be undone. (a) False (b) True
36. 36.True or false: sugar dissolves in water. (a) True (b) False
37. 37.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
38. 38.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) rusting iron (d) dissolving salt
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a magnet (d) a shallow dish
40. 40.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sawdust (d) glucose powder

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