Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 433 · 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 piece of string (b) a magnet (c) a spoon (d) a shallow dish
2. 2.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
3. 3.True or false: small pebbles does not dissolve in water. (a) True (b) False
4. 4.⚖️ 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
5. 5.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) freezing water (d) browning lemon ink
6. 6.🛟 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
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
8. 8.⚖️ 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
9. 9.⚖️ 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 change it (b) we measure it (c) we keep it the same
10. 10.⚖️ 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
11. 11.🔍 Which is the odd one out? (a) sawdust (b) sand (c) cooking oil (d) baking soda
12. 12.⚖️ 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) days to see crystals (c) the amount of water
13. 13.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) cooking an egg (d) dissolving salt
14. 14.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
15. 15.True or false: baking soda does not dissolve in water. (a) True (b) False
16. 16.True or false: rusting iron is a change that can be undone. (a) False (b) True
17. 17.True or false: sugar does not dissolve in water. (a) True (b) False
18. 18.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) sugar (d) sawdust
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
20. 20.⚖️ 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
21. 21.⚖️ 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 same dish
22. 22.⚖️ 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 water (b) sunny or shady place (c) the same dish (d) days to see crystals
23. 23.True or false: warm water is needed for growing salt crystals. (a) True (b) False
24. 24.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
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.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
27. 27.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
28. 28.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
30. 30.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
31. 31.⚖️ 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
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) warm water (d) salt
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) warm water (c) a shallow dish (d) a piece of string
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) turmeric powder (d) salt
36. 36.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
37. 37.True or false: sand does not dissolve in water. (a) False (b) True
38. 38.🧂 Which of these does not dissolve in water? (a) sand (b) baking soda (c) table salt (d) food colour
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) a mirror (d) a piece of string
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 kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of water

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