Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 528 · 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.⚖️ 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) True (b) False
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a shallow dish (d) yeast
4. 4.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
5. 5.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
6. 6.⚖️ 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) True (b) False
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
8. 8.⚖️ 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 change it (c) we measure it
9. 9.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
10. 10.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
11. 11.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.True or false: sugar does not dissolve in water. (a) False (b) True
15. 15.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) turmeric powder
20. 20.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) baking soda (d) table salt
21. 21.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
22. 22.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) small pebbles (d) table salt
23. 23.⚖️ 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) the kind of salt (c) days to see crystals
24. 24.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
25. 25.⚖️ 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 keep it the same (c) we measure it
26. 26.True or false: melting ice is a change that can be undone. (a) False (b) True
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
28. 28.⚖️ 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 same dish (c) the amount of water (d) days to see crystals
29. 29.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
30. 30.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
31. 31.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
32. 32.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
34. 34.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
35. 35.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) dissolving salt
36. 36.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) melting butter (d) dissolving salt
37. 37.⚖️ 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 water (b) the amount of salt (c) sunny or shady place (d) days to see crystals
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a magnet (c) warm water (d) a spoon
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a mirror (c) salt (d) warm water
40. 40.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars

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