Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 825 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
2. 2.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.⚖️ 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
4. 4.⚖️ 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 keep it the same (c) we measure it
5. 5.⚖️ 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 measure it (b) we keep it the same (c) we change it
6. 6.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
8. 8.⚖️ 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 water (c) days to see crystals
9. 9.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a balloon (d) yeast
10. 10.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
11. 11.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
12. 12.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧂 Which of these dissolves in water? (a) chalk powder (b) glucose powder (c) sand (d) sawdust
14. 14.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
15. 15.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) baking a cake (d) melting ice
16. 16.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.⚖️ 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 change it (c) we measure it
18. 18.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
19. 19.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
20. 20.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
21. 21.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) baking soda (d) small pebbles
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) a magnet
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 kept the same. (a) True (b) False
25. 25.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
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 does not dissolve in water? (a) glucose powder (b) baking soda (c) cooking oil (d) sugar
28. 28.🔮 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
29. 29.True or false: food colour does not dissolve in water. (a) True (b) False
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a battery cell (d) turmeric powder
31. 31.True or false: glucose powder does not dissolve in water. (a) False (b) True
32. 32.🧂 Which of these does not dissolve in water? (a) sugar (b) chalk powder (c) food colour (d) glucose powder
33. 33.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
34. 34.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) small pebbles (d) baking soda
35. 35.True or false: salt is needed for growing salt crystals. (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 amount of salt is kept the same. (a) False (b) True
37. 37.⚖️ 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
38. 38.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
39. 39.True or false: melting butter is a change that cannot be undone. (a) False (b) True
40. 40.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone

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