Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 999 · 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) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
2. 2.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) food colour (d) baking soda
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) a spoon (d) salt
4. 4.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) table salt (d) sugar
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
6. 6.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sawdust (d) baking soda
7. 7.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) dissolving salt (d) melting butter
8. 8.⚖️ 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
9. 9.⚖️ 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
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a spoon (d) a balloon
11. 11.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
12. 12.True or false: food colour dissolves in water. (a) True (b) False
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) small pebbles (d) table salt
16. 16.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) chalk powder (d) table salt
17. 17.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a magnet (d) a spoon
19. 19.True or false: baking a cake is a change that can be undone. (a) True (b) False
20. 20.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) freezing water (c) folding paper (d) dissolving salt
21. 21.True or false: yeast is needed for growing salt crystals. (a) True (b) False
22. 22.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
24. 24.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) warm water (d) a mirror
25. 25.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a mirror (d) a piece of string
27. 27.⚖️ 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) sunny or shady place (b) the kind of salt (c) the same dish (d) days to see crystals
28. 28.⚖️ 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 salt (b) the amount of water (c) the same dish (d) days to see crystals
29. 29.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) fish make it (d) sand is ground up
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a spoon (c) a mirror (d) a balloon
32. 32.True or false: table salt dissolves in water. (a) False (b) True
33. 33.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
34. 34.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) folding paper (d) baking a cake
35. 35.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
36. 36.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
37. 37.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
38. 38.⚖️ 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
39. 39.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
40. 40.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water

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