Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 74 · 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.True or false: freezing water is a change that can be undone. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) cooking oil (b) table salt (c) sugar (d) food colour
3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
4. 4.⚖️ 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) days to see crystals (c) sunny or shady place (d) the amount of salt
5. 5.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting butter (c) milk turning to curd (d) cooking an egg
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) salt (d) a spoon
9. 9.🔍 Which is the odd one out? (a) sand (b) sawdust (c) small pebbles (d) food colour
10. 10.⚖️ 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) True (b) False
11. 11.🧂 Which of these dissolves in water? (a) table salt (b) sawdust (c) chalk powder (d) sand
12. 12.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
13. 13.True or false: freezing water is a change that cannot be undone. (a) False (b) True
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a mirror (c) yeast (d) turmeric powder
15. 15.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
16. 16.🧂 Which of these does not dissolve in water? (a) chalk powder (b) table salt (c) baking soda (d) glucose powder
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) a piece of string (d) a shallow dish
18. 18.True or false: chalk powder does not dissolve in water. (a) False (b) True
19. 19.⚖️ 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
20. 20.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
21. 21.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
22. 22.🔍 Which is the odd one out? (a) table salt (b) small pebbles (c) sugar (d) baking soda
23. 23.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
24. 24.⚖️ 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) False (b) True
25. 25.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
26. 26.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
28. 28.True or false: rusting iron is a change that can be undone. (a) True (b) False
29. 29.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
30. 30.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) sugar (d) sand
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
32. 32.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
33. 33.True or false: sugar dissolves in water. (a) True (b) False
34. 34.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) food colour (d) sawdust
35. 35.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
36. 36.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sawdust (d) sand
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
38. 38.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) salt rains down (d) fish make it
39. 39.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
40. 40.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed

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