Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 627 · 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.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
2. 2.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
3. 3.True or false: warm water is needed for growing salt crystals. (a) False (b) True
4. 4.True or false: sand dissolves in water. (a) True (b) False
5. 5.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a battery cell (d) a piece of string
7. 7.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) baking soda (d) chalk powder
8. 8.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a piece of string (d) turmeric powder
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
11. 11.True or false: salt is needed for growing salt crystals. (a) True (b) False
12. 12.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a mirror (d) a spoon
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
16. 16.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) turmeric powder (d) a spoon
17. 17.True or false: cooking an egg is a change that can be undone. (a) False (b) True
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
20. 20.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
21. 21.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) cooking an egg (d) freezing water
22. 22.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
23. 23.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
24. 24.⚖️ 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 change it (b) we measure it (c) we keep it the same
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
26. 26.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a magnet (c) a battery cell (d) turmeric powder
28. 28.True or false: yeast is needed for growing salt crystals. (a) False (b) True
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a piece of string (d) yeast
30. 30.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
31. 31.⚖️ 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
32. 32.🔍 Which is the odd one out? (a) table salt (b) sand (c) baking soda (d) sugar
33. 33.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
35. 35.⚖️ 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
36. 36.True or false: small pebbles does not dissolve in water. (a) True (b) False
37. 37.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) sawdust
39. 39.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
40. 40.⚖️ 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

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