Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 347 · 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 of these is not needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) salt (d) warm water
2. 2.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) a shallow dish (d) a piece of string
5. 5.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) chalk powder (d) food colour
6. 6.True or false: small pebbles does not dissolve in water. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) food colour (d) glucose powder
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) warm water (d) a mirror
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
10. 10.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
11. 11.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) sand (b) baking soda (c) chalk powder (d) small pebbles
13. 13.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
14. 14.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.⚖️ 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
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
17. 17.True or false: baking soda does not dissolve in water. (a) True (b) False
18. 18.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) browning lemon ink (d) melting butter
19. 19.⚖️ 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
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
22. 22.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
23. 23.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
24. 24.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) food colour (d) cooking oil
25. 25.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) turmeric powder (d) a shallow dish
27. 27.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) turmeric powder (c) a shallow dish (d) warm water
29. 29.True or false: melting butter is a change that can be undone. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) sugar (d) glucose powder
31. 31.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
32. 32.True or false: sugar dissolves in water. (a) False (b) True
33. 33.⚖️ 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
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a piece of string (c) warm water (d) salt
36. 36.⚖️ 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 kind of salt (c) days to see crystals (d) sunny or shady place
37. 37.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a piece of string (d) a mirror
38. 38.True or false: cooking oil does not dissolve in water. (a) True (b) False
39. 39.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.⚖️ 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 amount of salt (b) sunny or shady place (c) the kind of salt (d) the amount of water

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