Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 485 · 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 a change that can be undone? (a) melting butter (b) baking a cake (c) rusting iron (d) milk turning to curd
2. 2.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
3. 3.⚖️ 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) the amount of water (c) days to see crystals (d) sunny or shady place
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) salt (d) turmeric powder
5. 5.⚖️ 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
6. 6.True or false: sawdust does not dissolve in water. (a) False (b) True
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) yeast (d) salt
8. 8.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
10. 10.🧂 Which of these dissolves in water? (a) sand (b) baking soda (c) cooking oil (d) sawdust
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) salt (d) a spoon
12. 12.🧂 Which of these does not dissolve in water? (a) sawdust (b) baking soda (c) table salt (d) glucose powder
13. 13.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) chalk powder (d) glucose powder
14. 14.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
15. 15.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
16. 16.True or false: chalk powder dissolves in water. (a) False (b) True
17. 17.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
18. 18.True or false: warm water is needed for growing salt crystals. (a) False (b) True
19. 19.⚖️ 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 keep it the same (b) we measure it (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 same dish”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.True or false: baking soda does not dissolve in water. (a) False (b) True
22. 22.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
25. 25.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) sand (d) food colour
28. 28.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
29. 29.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) rusting iron (d) milk turning to curd
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) a piece of string (d) a spoon
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a shallow dish (d) a piece of string
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.🛟 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
34. 34.True or false: glucose powder does not dissolve in water. (a) False (b) True
35. 35.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
36. 36.⚖️ 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 measure it (b) we keep it the same (c) we change it
37. 37.True or false: food colour does not dissolve in water. (a) False (b) True
38. 38.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
39. 39.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) dissolving salt (d) baking a cake
40. 40.⚖️ 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) the amount of water (c) sunny or shady place

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