Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 855 · 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.True or false: melting ice is a change that cannot be undone. (a) True (b) False
2. 2.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
3. 3.True or false: melting butter is a change that can be undone. (a) False (b) True
4. 4.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
5. 5.True or false: folding paper is a change that can be undone. (a) False (b) True
6. 6.⚖️ 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 keep it the same (c) we measure it
7. 7.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
9. 9.⚖️ 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) sunny or shady place (c) the same dish (d) the amount of water
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) warm water (d) salt
11. 11.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) baking a cake (d) melting butter
12. 12.⚖️ 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) days to see crystals (c) the amount of salt (d) the amount of water
13. 13.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
14. 14.⚖️ 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 keep it the same (b) we change it (c) we measure it
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
16. 16.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) freezing water (d) melting butter
17. 17.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
18. 18.True or false: table salt dissolves in water. (a) False (b) True
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.True or false: glucose powder dissolves in water. (a) True (b) False
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) a balloon
22. 22.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
23. 23.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
24. 24.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
25. 25.True or false: cooking oil dissolves in water. (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 kind of salt is kept the same. (a) True (b) False
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
28. 28.True or false: sugar dissolves in water. (a) False (b) True
29. 29.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a spoon (d) a piece of string
31. 31.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
33. 33.🧈 Which of these is a change that can be undone? (a) melting ice (b) milk turning to curd (c) baking a cake (d) cooking an egg
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a piece of string (c) a magnet (d) yeast
35. 35.True or false: small pebbles dissolves in water. (a) True (b) False
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) sunny or shady place (c) days to see crystals
37. 37.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) rusting iron (d) milk turning to curd
38. 38.⚖️ 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 same dish (c) sunny or shady place
39. 39.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
40. 40.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed

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