Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 288 · 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: folding paper is a change that cannot be undone. (a) True (b) False
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
3. 3.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
4. 4.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
5. 5.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) melting ice (d) milk turning to curd
6. 6.⚖️ 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
7. 7.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a spoon (c) a shallow dish (d) salt
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) warm water (d) a balloon
10. 10.⚖️ 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 keep it the same (b) we measure it (c) we change it
11. 11.True or false: cooking an egg is a change that can be undone. (a) True (b) False
12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
13. 13.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.⚖️ 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
15. 15.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) salt (d) a piece of string
17. 17.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
18. 18.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) dissolving salt (d) baking a cake
19. 19.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
21. 21.True or false: yeast is needed for growing salt crystals. (a) True (b) False
22. 22.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) cooking an egg (d) baking a cake
23. 23.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) sawdust (d) food colour
24. 24.🧂 Which of these dissolves in water? (a) baking soda (b) chalk powder (c) small pebbles (d) cooking oil
25. 25.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a mirror (d) a shallow dish
27. 27.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
28. 28.⚖️ 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
29. 29.🧂 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
30. 30.True or false: sawdust does not dissolve in water. (a) True (b) False
31. 31.True or false: melting butter is a change that cannot be undone. (a) False (b) True
32. 32.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the amount of salt (c) days to see crystals
34. 34.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sand (d) glucose powder
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) turmeric powder (d) warm water
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a piece of string (d) salt
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a balloon (c) a piece of string (d) salt
39. 39.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) dissolving salt (d) baking a cake
40. 40.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals

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