Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 272 · 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.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
2. 2.⚖️ 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
3. 3.🧺 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
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a spoon (d) a shallow dish
6. 6.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) sea water evaporates (c) fish make it (d) salt rains down
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) warm water (c) a magnet (d) yeast
8. 8.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
9. 9.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) sand (d) baking soda
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) a spoon (d) a piece of string
12. 12.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
13. 13.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) warm water (d) a piece of string
15. 15.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
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) the amount of water (b) sunny or shady place (c) the amount of salt (d) days to see crystals
17. 17.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: table salt does not dissolve in water. (a) False (b) True
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) salt (c) a shallow dish (d) warm water
20. 20.🔍 Which is the odd one out? (a) food colour (b) sugar (c) table salt (d) chalk powder
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
22. 22.⚖️ 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) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) yeast (d) a shallow dish
24. 24.⚖️ 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) the amount of salt (c) days to see crystals (d) the amount of water
25. 25.⚖️ 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) True (b) False
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) salt (d) a balloon
27. 27.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
28. 28.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
29. 29.⚖️ 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
30. 30.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) folding paper (d) baking a cake
31. 31.⚖️ 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
32. 32.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
33. 33.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
34. 34.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
35. 35.True or false: glucose powder dissolves in water. (a) True (b) False
36. 36.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
37. 37.⚖️ 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
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
39. 39.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
40. 40.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water

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