Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 940 · 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.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
2. 2.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) dissolving salt (c) cooking an egg (d) rusting iron
3. 3.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
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 salt”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
7. 7.True or false: chalk powder dissolves in water. (a) False (b) True
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) turmeric powder
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) a balloon (d) a spoon
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a shallow dish (d) a magnet
12. 12.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sand (d) sugar
13. 13.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) table salt (d) food colour
14. 14.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
15. 15.⚖️ 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) False (b) True
16. 16.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a battery cell (d) salt
20. 20.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
21. 21.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
22. 22.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
23. 23.True or false: freezing water is a change that cannot be undone. (a) True (b) False
24. 24.True or false: salt is not needed for growing salt crystals. (a) True (b) False
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a piece of string (d) a balloon
26. 26.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sugar (d) chalk powder
28. 28.⚖️ 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
29. 29.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.True or false: glucose powder dissolves in water. (a) True (b) False
31. 31.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
32. 32.⚖️ 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
33. 33.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a piece of string (d) a balloon
35. 35.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) glucose powder (d) sawdust
36. 36.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) browning lemon ink (d) milk turning to curd
38. 38.⚖️ 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 measure it (c) we keep it the same
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to change its colour (d) to cool the water
40. 40.True or false: chalk powder does not dissolve in water. (a) False (b) True

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