Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 739 · 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 dissolves in water? (a) glucose powder (b) chalk powder (c) small pebbles (d) sand
2. 2.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
3. 3.True or false: table salt dissolves in water. (a) False (b) True
4. 4.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) salt (d) a spoon
6. 6.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
7. 7.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) food colour (d) sawdust
8. 8.🛟 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
9. 9.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) melting butter (d) milk turning to curd
10. 10.🔍 Which is the odd one out? (a) sugar (b) table salt (c) small pebbles (d) baking soda
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.True or false: baking soda dissolves in water. (a) True (b) False
13. 13.⚖️ 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
14. 14.⚖️ 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 amount of water (b) the amount of salt (c) the same dish (d) sunny or shady place
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
16. 16.🧂 Which of these dissolves in water? (a) sand (b) baking soda (c) cooking oil (d) chalk powder
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) yeast (d) a spoon
19. 19.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) browning lemon ink (d) melting ice
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the same dish (c) the amount of water (d) sunny or shady place
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 change it (b) we measure it (c) we keep it the same
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) warm water (d) a mirror
23. 23.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) rusting iron (d) melting butter
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) sand (b) sugar (c) cooking oil (d) chalk powder
26. 26.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
27. 27.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
28. 28.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) table salt (d) sand
29. 29.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
30. 30.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
31. 31.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
32. 32.True or false: freezing water is a change that cannot be undone. (a) False (b) True
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a spoon (d) yeast
34. 34.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
35. 35.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) freezing water (d) rusting iron
36. 36.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) sand (d) sawdust
37. 37.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) cooking oil (d) sand
38. 38.True or false: cooking oil does not dissolve in water. (a) True (b) False
39. 39.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) baking a cake (d) dissolving salt

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