Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 330 · 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? What do we do with “the same dish”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
3. 3.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) warm water (d) yeast
4. 4.🧂 Which of these dissolves in water? (a) glucose powder (b) small pebbles (c) sawdust (d) chalk powder
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a mirror (c) salt (d) a shallow dish
6. 6.⚖️ 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) False (b) True
7. 7.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
8. 8.True or false: freezing water is a change that can be undone. (a) False (b) True
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
10. 10.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a magnet (d) a mirror
11. 11.True or false: chalk powder does not dissolve in water. (a) True (b) False
12. 12.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) salt eats water (d) the dish melts
13. 13.🔍 Which is the odd one out? (a) table salt (b) food colour (c) small pebbles (d) sugar
14. 14.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) warm water (d) a balloon
16. 16.⚖️ 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
17. 17.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
18. 18.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a mirror (c) a spoon (d) salt
21. 21.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
22. 22.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a shallow dish (c) a mirror (d) turmeric powder
23. 23.⚖️ 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 measure it (c) we keep it the same
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) a piece of string (d) a battery cell
25. 25.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.⚖️ 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 kind of salt
28. 28.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
29. 29.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
30. 30.True or false: cooking oil does not dissolve in water. (a) True (b) False
31. 31.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
32. 32.⚖️ 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
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a balloon (d) a shallow dish
34. 34.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
35. 35.⚖️ 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) True (b) False
36. 36.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
37. 37.⚖️ 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) the same dish (c) days to see crystals (d) the amount of salt
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
39. 39.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
40. 40.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed

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