Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 601 · 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 cannot be undone? (a) melting butter (b) baking a cake (c) melting ice (d) folding paper
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 water”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a magnet (d) warm water
4. 4.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) freezing water (d) melting ice
5. 5.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
6. 6.⚖️ 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) days to see crystals (c) sunny or shady place (d) the same dish
7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
8. 8.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
9. 9.⚖️ 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) False (b) True
10. 10.⚖️ 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) True (b) False
11. 11.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
12. 12.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a spoon (c) salt (d) a shallow dish
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a balloon (d) a spoon
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) warm water (c) salt (d) a shallow dish
16. 16.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sugar (d) chalk powder
17. 17.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.⚖️ 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
19. 19.🔍 Which is the odd one out? (a) sugar (b) food colour (c) glucose powder (d) sawdust
20. 20.🛟 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
21. 21.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
22. 22.⚖️ 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
23. 23.True or false: warm water is needed for growing salt crystals. (a) True (b) False
24. 24.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) melting ice (d) folding paper
25. 25.🧂 Which of these dissolves in water? (a) cooking oil (b) table salt (c) sand (d) chalk powder
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) warm water (c) a battery cell (d) yeast
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
28. 28.True or false: sugar does not dissolve in water. (a) False (b) True
29. 29.⚖️ 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) the amount of water (d) days to see crystals
30. 30.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
31. 31.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sawdust (c) food colour (d) table salt
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) turmeric powder (c) salt (d) warm water
34. 34.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
35. 35.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
36. 36.True or false: yeast is needed for growing salt crystals. (a) True (b) False
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) a balloon
38. 38.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
39. 39.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a balloon (c) a battery cell (d) a shallow dish

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