Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 755 · 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: glucose powder does not dissolve in water. (a) True (b) False
2. 2.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
3. 3.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a mirror (d) salt
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) crystals grow faster (d) it turns sweet
6. 6.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
7. 7.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
8. 8.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) small pebbles (d) sugar
9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
10. 10.🧂 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
11. 11.⚖️ 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 keep it the same (c) we measure it
12. 12.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
13. 13.⚖️ 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 same dish (b) the amount of salt (c) days to see crystals (d) the kind of salt
14. 14.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.⚖️ 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) True (b) False
16. 16.⚖️ 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) sunny or shady place (b) the kind of salt (c) the amount of salt (d) days to see crystals
17. 17.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
18. 18.True or false: sugar does not dissolve in water. (a) False (b) True
19. 19.⚖️ 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
20. 20.True or false: sand dissolves in water. (a) False (b) True
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) turmeric powder (d) salt
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
25. 25.🧂 Which of these does not dissolve in water? (a) baking soda (b) cooking oil (c) table salt (d) glucose powder
26. 26.True or false: table salt does not dissolve in water. (a) True (b) False
27. 27.🧂 Which of these does not dissolve in water? (a) sawdust (b) sugar (c) table salt (d) food colour
28. 28.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
29. 29.⚖️ 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 measure it (c) we keep it the same
30. 30.🔍 Which is the odd one out? (a) sand (b) sawdust (c) cooking oil (d) baking soda
31. 31.True or false: glucose powder dissolves in water. (a) False (b) True
32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
33. 33.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
34. 34.True or false: freezing water is a change that can be undone. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) sand (d) cooking oil
36. 36.⚖️ 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 measure it (b) we keep it the same (c) we change it
37. 37.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
39. 39.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) dissolving salt (d) baking a cake
40. 40.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a spoon (d) a battery cell

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