Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 491 · 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 eats water (c) water evaporates (d) salt grows roots
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
3. 3.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) cooking an egg (c) melting butter (d) freezing water
4. 4.True or false: chalk powder does not dissolve in water. (a) True (b) False
5. 5.⚖️ 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
6. 6.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sawdust (d) sugar
7. 7.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
8. 8.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
11. 11.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) cooking an egg (d) melting ice
12. 12.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) folding paper (d) melting butter
13. 13.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) browning lemon ink (d) dissolving salt
15. 15.⚖️ 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 amount of water (b) the amount of salt (c) sunny or shady place (d) days to see crystals
16. 16.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a shallow dish (d) warm water
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
19. 19.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
20. 20.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a spoon (d) turmeric powder
22. 22.True or false: baking soda does not dissolve in water. (a) True (b) False
23. 23.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.True or false: warm water is needed for growing salt crystals. (a) True (b) False
25. 25.⚖️ 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 measure it (c) we keep it the same
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) salt (d) a piece of string
27. 27.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
28. 28.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) salt (c) warm water (d) a piece of string
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
34. 34.True or false: melting butter is a change that cannot be undone. (a) True (b) False
35. 35.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
36. 36.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
37. 37.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) sand (d) glucose powder
38. 38.True or false: table salt dissolves in water. (a) True (b) False
39. 39.True or false: cooking an egg is a change that can be undone. (a) False (b) True
40. 40.🧂 Which of these dissolves in water? (a) sugar (b) chalk powder (c) cooking oil (d) sand

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