Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 956 · 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.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
2. 2.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.⚖️ 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 kind of salt
4. 4.True or false: chalk powder dissolves in water. (a) True (b) False
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) rusting iron (c) dissolving salt (d) freezing water
6. 6.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
7. 7.⚖️ 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) days to see crystals (d) the amount of water
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 is the odd one out? (a) food colour (b) small pebbles (c) baking soda (d) sugar
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) salt (d) a battery cell
11. 11.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
12. 12.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
13. 13.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a balloon (d) warm water
16. 16.True or false: melting butter is a change that cannot be undone. (a) False (b) True
17. 17.True or false: baking soda dissolves in water. (a) True (b) False
18. 18.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
19. 19.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a spoon (d) a piece of string
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a magnet (d) salt
22. 22.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
23. 23.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
24. 24.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) table salt (d) sawdust
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) a battery cell
26. 26.⚖️ 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 same dish (c) the amount of salt (d) the kind of salt
27. 27.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
28. 28.⚖️ 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
29. 29.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
30. 30.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a balloon (c) a mirror (d) a battery cell
32. 32.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.True or false: salt is not needed for growing salt crystals. (a) True (b) False
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
35. 35.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
36. 36.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
37. 37.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
38. 38.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
39. 39.True or false: sawdust does not dissolve in water. (a) True (b) False
40. 40.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve

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