Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 415 · 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.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) sawdust (d) food colour
2. 2.⚖️ 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) the amount of water (c) sunny or shady place (d) days to see crystals
3. 3.True or false: baking a cake is a change that can be undone. (a) False (b) True
4. 4.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
5. 5.⚖️ 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) False (b) True
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a battery cell (d) a piece of string
7. 7.⚖️ 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
8. 8.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
9. 9.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
10. 10.⚖️ 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) days to see crystals (c) the same dish (d) sunny or shady place
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
12. 12.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) turmeric powder (d) a balloon
13. 13.True or false: warm water is needed for growing salt crystals. (a) True (b) False
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 change it (b) we measure it (c) we keep it the same
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a balloon (d) warm water
16. 16.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting butter (c) cooking an egg (d) baking a cake
17. 17.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
18. 18.True or false: small pebbles does not dissolve in water. (a) False (b) True
19. 19.⚖️ 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
20. 20.⚖️ 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 measure it (c) we keep it the same
21. 21.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a shallow dish (d) a spoon
24. 24.True or false: glucose powder does not dissolve in water. (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 “sunny or shady place”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) baking a cake (d) folding paper
27. 27.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
28. 28.⚖️ 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 change it (c) we keep it the same
29. 29.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) sand
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
31. 31.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
32. 32.🧂 Does sugar 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) days to see crystals (b) sunny or shady place (c) the amount of water
34. 34.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
35. 35.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) food colour (d) sugar
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
38. 38.⚖️ 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
39. 39.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) cooking oil (d) baking soda
40. 40.True or false: sugar does not dissolve in water. (a) False (b) True

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