Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 188 · 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: a mirror is not needed for growing salt crystals. (a) True (b) False
2. 2.⚖️ 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) False (b) True
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a balloon (c) a spoon (d) a shallow dish
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
5. 5.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) sawdust (d) glucose powder
6. 6.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
7. 7.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
8. 8.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a battery cell (d) warm water
10. 10.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) table salt (d) glucose powder
11. 11.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
12. 12.⚖️ 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
13. 13.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
14. 14.True or false: salt is not needed for growing salt crystals. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) sand (b) sawdust (c) sugar (d) chalk powder
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a magnet (d) a piece of string
18. 18.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) table salt (d) food colour
19. 19.⚖️ 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 amount of water (c) sunny or shady place
20. 20.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
21. 21.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) a piece of string (d) a spoon
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) turmeric powder (d) a spoon
24. 24.⚖️ 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 kind of salt (b) sunny or shady place (c) the same dish (d) days to see crystals
25. 25.⚖️ 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) True (b) False
26. 26.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
27. 27.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
29. 29.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
30. 30.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
31. 31.True or false: table salt dissolves in water. (a) False (b) True
32. 32.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
33. 33.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
35. 35.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
36. 36.⚖️ 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 kind of salt (c) days to see crystals
37. 37.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
38. 38.True or false: sand dissolves in water. (a) False (b) True
39. 39.⚖️ 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 kind of salt (b) sunny or shady place (c) the amount of salt (d) days to see crystals
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) a shallow dish (c) warm water (d) salt

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