Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 645 · 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.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) baking soda (d) small pebbles
2. 2.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) glucose powder (d) chalk powder
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
4. 4.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
5. 5.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) table salt (d) baking soda
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
8. 8.True or false: glucose powder dissolves in water. (a) False (b) True
9. 9.True or false: baking a cake is a change that can be undone. (a) True (b) False
10. 10.True or false: freezing water 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? What do we do with “sunny or shady place”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
13. 13.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
14. 14.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
15. 15.True or false: yeast is needed for growing salt crystals. (a) False (b) True
16. 16.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting butter (c) rusting iron (d) milk turning to curd
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.True or false: sugar dissolves in water. (a) False (b) True
19. 19.True or false: salt is not needed for growing salt crystals. (a) False (b) True
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) salt (c) warm water (d) a piece of string
21. 21.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
22. 22.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) food colour (d) cooking oil
23. 23.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
24. 24.🔍 Which is the odd one out? (a) food colour (b) table salt (c) chalk powder (d) sugar
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) a spoon (d) a shallow dish
26. 26.⚖️ 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
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
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) sunny or shady place (b) days to see crystals (c) the kind of salt
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.True or false: folding paper is a change that cannot be undone. (a) False (b) True
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) turmeric powder (d) salt
32. 32.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
33. 33.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
34. 34.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) salt (d) a piece of string
36. 36.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) food colour (d) sawdust
37. 37.⚖️ 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 amount of water (b) days to see crystals (c) the same dish (d) the amount of salt
38. 38.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
39. 39.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) table salt (d) chalk powder
40. 40.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a battery cell (c) a balloon (d) a mirror

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