Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 643 · 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) dissolving salt (b) freezing water (c) folding paper (d) cooking an egg
2. 2.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
3. 3.True or false: glucose powder does not dissolve in water. (a) False (b) True
4. 4.🧺 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 piece of string
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a balloon (d) a spoon
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) yeast (d) salt
8. 8.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
9. 9.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
10. 10.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
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 measure it (b) we change it (c) we keep it the same
12. 12.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
13. 13.True or false: sand dissolves in water. (a) True (b) False
14. 14.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a mirror (c) a shallow dish (d) a spoon
16. 16.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
17. 17.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) melting ice (d) melting butter
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a magnet (d) salt
20. 20.⚖️ 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) False (b) True
21. 21.⚖️ 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) days to see crystals (c) the amount of water (d) the kind of salt
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
23. 23.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
25. 25.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a battery cell (d) a piece of string
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) a mirror (d) a shallow dish
27. 27.🌊 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
28. 28.True or false: melting ice is a change that cannot be undone. (a) False (b) True
29. 29.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
30. 30.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a battery cell (c) warm water (d) salt
32. 32.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
35. 35.⚖️ 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) False (b) True
36. 36.⚖️ 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
37. 37.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
38. 38.True or false: rusting iron is a change that can be undone. (a) False (b) True
39. 39.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) milk turning to curd (d) melting butter
40. 40.⚖️ 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

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