Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 208 · 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 crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
3. 3.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
7. 7.🧈 Which of these is a change that can be undone? (a) melting ice (b) browning lemon ink (c) baking a cake (d) rusting iron
8. 8.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
9. 9.⚖️ 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 measure it (c) we keep it the same
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? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
12. 12.True or false: table salt does not dissolve in water. (a) True (b) False
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a shallow dish (d) a mirror
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) warm water (d) turmeric powder
15. 15.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
16. 16.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.⚖️ 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 kind of salt (b) the same dish (c) the amount of water (d) sunny or shady place
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a balloon (d) salt
19. 19.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
20. 20.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) folding paper (d) dissolving salt
21. 21.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.True or false: cooking oil dissolves in water. (a) False (b) True
23. 23.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
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.⚖️ 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
27. 27.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a balloon (c) turmeric powder (d) a magnet
28. 28.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a magnet (d) a spoon
30. 30.⚖️ 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 change it (c) we measure it
31. 31.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
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) sunny or shady place (b) days to see crystals (c) the same dish (d) the amount of water
33. 33.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
35. 35.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
36. 36.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) sand (d) small pebbles
37. 37.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
38. 38.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
40. 40.True or false: freezing water is a change that cannot be undone. (a) False (b) True

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