Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 243 · 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.⚖️ 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
2. 2.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a mirror (c) a balloon (d) a magnet
3. 3.True or false: sawdust does not dissolve in water. (a) False (b) True
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
5. 5.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
6. 6.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) baking soda (d) chalk powder
7. 7.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a balloon (d) a shallow dish
9. 9.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) sand (d) chalk powder
13. 13.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
14. 14.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
15. 15.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) sugar (d) small pebbles
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a magnet (d) a piece of string
17. 17.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
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) days to see crystals (b) the amount of water (c) sunny or shady place
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 salt”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.⚖️ 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
21. 21.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) the amount of salt (d) the same dish
24. 24.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
25. 25.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
26. 26.True or false: yeast is needed for growing salt crystals. (a) True (b) False
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 kept the same. (a) False (b) True
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a magnet (d) salt
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
30. 30.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) a mirror (d) turmeric powder
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) a spoon (d) warm water
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a piece of string (d) a shallow dish
35. 35.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
36. 36.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
37. 37.True or false: freezing water is a change that cannot be undone. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) glucose powder (d) baking soda
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) the amount of water (b) the amount of salt (c) the kind of salt (d) sunny or shady place
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) yeast (d) salt

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