Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 199 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
2. 2.True or false: melting butter is a change that cannot be undone. (a) True (b) False
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a balloon (d) salt
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a piece of string (d) a magnet
5. 5.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
6. 6.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) melting ice (d) rusting iron
7. 7.True or false: sawdust does not dissolve in water. (a) True (b) False
8. 8.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
9. 9.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
10. 10.True or false: baking soda dissolves in water. (a) False (b) True
11. 11.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
12. 12.True or false: yeast is needed for growing salt crystals. (a) False (b) True
13. 13.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a piece of string (c) salt (d) warm water
16. 16.⚖️ 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 kind of salt (b) sunny or shady place (c) the amount of water (d) the same dish
17. 17.🧂 Which of these dissolves in water? (a) chalk powder (b) glucose powder (c) cooking oil (d) sand
18. 18.🔍 Which is the odd one out? (a) table salt (b) small pebbles (c) glucose powder (d) food colour
19. 19.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
21. 21.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
22. 22.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) browning lemon ink (d) rusting iron
23. 23.⚖️ 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
24. 24.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a battery cell (d) salt
26. 26.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a shallow dish (d) yeast
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) salt (d) a shallow dish
29. 29.True or false: cooking oil dissolves in water. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) food colour (d) sawdust
31. 31.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) turmeric powder
33. 33.True or false: folding paper is a change that cannot be undone. (a) False (b) True
34. 34.⚖️ 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 water (c) days to see crystals
35. 35.True or false: chalk powder does not dissolve in water. (a) True (b) False
36. 36.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) folding paper (c) freezing water (d) melting butter
37. 37.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧂 Which of these does not dissolve in water? (a) sand (b) table salt (c) food colour (d) sugar
39. 39.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
40. 40.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic

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