Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 622 · 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? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚖️ 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
3. 3.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) dissolving salt (d) baking a cake
4. 4.True or false: sand does not dissolve in water. (a) False (b) True
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
6. 6.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a spoon (c) a mirror (d) yeast
8. 8.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
9. 9.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting ice (c) folding paper (d) dissolving salt
10. 10.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
11. 11.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) sand (d) food colour
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a mirror (c) a spoon (d) warm water
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
14. 14.🧂 Which of these does not dissolve in water? (a) sugar (b) table salt (c) baking soda (d) small pebbles
15. 15.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
16. 16.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) folding paper (d) milk turning to curd
17. 17.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a shallow dish (d) a mirror
19. 19.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
20. 20.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) browning lemon ink (c) melting butter (d) melting ice
21. 21.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) small pebbles (d) table salt
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) yeast (d) warm water
23. 23.True or false: sawdust does not dissolve in water. (a) False (b) True
24. 24.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
25. 25.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a balloon (d) a mirror
28. 28.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) sugar (d) sawdust
29. 29.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
30. 30.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
32. 32.⚖️ 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) the kind of salt (d) days to see crystals
33. 33.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
34. 34.True or false: chalk powder dissolves in water. (a) True (b) False
35. 35.True or false: folding paper is a change that cannot be undone. (a) True (b) False
36. 36.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
40. 40.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) table salt (d) chalk powder

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