Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 873 · 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 needed for growing salt crystals? (a) yeast (b) a balloon (c) a shallow dish (d) a battery cell
2. 2.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
4. 4.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) food colour (d) chalk powder
5. 5.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) a spoon (d) a piece of string
7. 7.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
8. 8.⚖️ 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 change it (b) we measure it (c) we keep it the same
9. 9.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) small pebbles (d) baking soda
10. 10.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
11. 11.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
12. 12.⚖️ 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
13. 13.True or false: glucose powder dissolves in water. (a) False (b) True
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
15. 15.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) warm water (c) a balloon (d) a battery cell
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) a shallow dish (d) warm water
18. 18.True or false: freezing water is a change that cannot be undone. (a) False (b) True
19. 19.True or false: food colour does not dissolve in water. (a) True (b) False
20. 20.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) milk turning to curd (d) melting butter
21. 21.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) sugar (d) small pebbles
22. 22.⚖️ 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 water (b) days to see crystals (c) sunny or shady place
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) a spoon (d) a piece of string
24. 24.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) folding paper (d) baking a cake
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a balloon (d) a spoon
26. 26.🔍 Which is the odd one out? (a) table salt (b) sawdust (c) cooking oil (d) sand
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
28. 28.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.True or false: melting ice is a change that cannot be undone. (a) False (b) True
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a mirror (c) a magnet (d) a balloon
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) warm water (d) a mirror
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of salt (c) sunny or shady place (d) the same dish
33. 33.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) warm water (d) turmeric powder
35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
37. 37.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny stars (d) tiny cubes
38. 38.⚖️ 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 change it (b) we measure it (c) we keep it the same
39. 39.True or false: chalk powder dissolves in water. (a) False (b) True
40. 40.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) chalk powder (d) food colour

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