Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 815 · 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 is a change that cannot be undone? (a) melting ice (b) browning lemon ink (c) folding paper (d) freezing water
2. 2.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
3. 3.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) freezing water (d) milk turning to curd
4. 4.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
5. 5.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) folding paper (d) milk turning to curd
6. 6.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) salt rains down (d) sea water evaporates
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a spoon (d) turmeric powder
8. 8.⚖️ 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 change it (b) we measure it (c) we keep it the same
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
10. 10.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) sand (d) glucose powder
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
12. 12.⚖️ 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
13. 13.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) baking a cake (d) browning lemon ink
14. 14.True or false: small pebbles dissolves in water. (a) False (b) True
15. 15.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) freezing water (d) baking a cake
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) salt (d) warm water
17. 17.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
19. 19.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
20. 20.True or false: melting butter is a change that cannot be undone. (a) False (b) True
21. 21.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
22. 22.⚖️ 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
23. 23.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
24. 24.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a battery cell (c) a spoon (d) warm water
27. 27.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
28. 28.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a battery cell (c) a balloon (d) a mirror
29. 29.True or false: folding paper is a change that can be undone. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) table salt (d) glucose powder
31. 31.True or false: cooking oil dissolves in water. (a) False (b) True
32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
33. 33.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
34. 34.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
35. 35.🧂 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) table salt (d) glucose powder
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
38. 38.True or false: sugar dissolves in water. (a) False (b) True
39. 39.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a spoon (d) a magnet

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