Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 227 · 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 same dish is what we measure. (a) True (b) False
2. 2.⚖️ 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) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the kind of salt
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) it turns to butter (d) salt crystals form
4. 4.🧺 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) a balloon
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
7. 7.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
9. 9.True or false: table salt does not dissolve in water. (a) False (b) True
10. 10.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
11. 11.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) sawdust (d) sugar
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
13. 13.🔍 Which is the odd one out? (a) food colour (b) cooking oil (c) glucose powder (d) table salt
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a shallow dish (d) a piece of string
15. 15.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
16. 16.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
20. 20.True or false: baking soda does not dissolve in water. (a) True (b) False
21. 21.True or false: cooking oil dissolves in water. (a) False (b) True
22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
23. 23.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
24. 24.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
25. 25.True or false: salt is not needed for growing salt crystals. (a) True (b) False
26. 26.True or false: baking a cake is a change that can be undone. (a) True (b) False
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) salt (d) a magnet
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 kind of salt (b) sunny or shady place (c) days to see crystals (d) the amount of water
29. 29.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
30. 30.True or false: melting ice is a change that can be undone. (a) False (b) True
31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
32. 32.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) baking soda (d) chalk powder
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a mirror (c) a spoon (d) a piece of string
34. 34.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
35. 35.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) milk turning to curd (d) freezing water
36. 36.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
38. 38.⚖️ 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
39. 39.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
40. 40.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False

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