Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 453 · 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 cannot be undone. (a) False (b) True
2. 2.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a spoon (c) a mirror (d) yeast
4. 4.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) food colour (d) sugar
5. 5.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) sand (d) sawdust
6. 6.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
8. 8.True or false: cooking an egg is a change that can be undone. (a) False (b) True
9. 9.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
10. 10.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
11. 11.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) salt rains down (d) sea water evaporates
12. 12.True or false: freezing water is a change that can be undone. (a) True (b) False
13. 13.True or false: baking soda dissolves in water. (a) True (b) False
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) a balloon (d) yeast
15. 15.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
16. 16.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting ice (d) rusting iron
17. 17.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
18. 18.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
19. 19.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) salt (d) a mirror
20. 20.🧂 Which of these does not dissolve in water? (a) cooking oil (b) baking soda (c) food colour (d) table salt
21. 21.⚖️ 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 change it (c) we measure it
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) salt (d) a spoon
23. 23.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
24. 24.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) melting butter (d) melting ice
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) a piece of string (d) a shallow dish
26. 26.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
27. 27.True or false: chalk powder dissolves in water. (a) True (b) False
28. 28.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
29. 29.🧂 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
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the kind of salt (d) the amount of salt
31. 31.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
32. 32.True or false: sand does not dissolve in water. (a) False (b) True
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a spoon (d) turmeric powder
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a battery cell (d) salt
35. 35.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
37. 37.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.⚖️ 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) days to see crystals (b) the same dish (c) the amount of salt (d) sunny or shady place
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) days to see crystals (c) the same dish

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