Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 378 · 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? Which of these is the one thing we change? (a) the same dish (b) the kind of salt (c) the amount of salt (d) sunny or shady place
2. 2.True or false: sugar dissolves in water. (a) False (b) True
3. 3.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
4. 4.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) cooking oil (d) table salt
5. 5.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
9. 9.True or false: salt is needed for growing salt crystals. (a) False (b) True
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) the amount of salt (d) days to see crystals
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a battery cell (c) a spoon (d) warm water
12. 12.True or false: melting ice is a change that cannot be undone. (a) True (b) False
13. 13.True or false: folding paper is a change that cannot be undone. (a) True (b) False
14. 14.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
15. 15.True or false: freezing water is a change that cannot be undone. (a) True (b) False
16. 16.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (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 salt”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) small pebbles (d) sawdust
20. 20.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) dissolving salt (d) browning lemon ink
21. 21.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty
22. 22.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
23. 23.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) freezing water (d) rusting iron
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a balloon (d) warm water
25. 25.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a spoon (d) warm water
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a piece of string (d) yeast
28. 28.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) folding paper (d) browning lemon ink
30. 30.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) table salt (d) glucose powder
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) a magnet (d) a mirror
32. 32.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) glucose powder (d) chalk powder
33. 33.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a shallow dish (d) a magnet
35. 35.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
36. 36.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
37. 37.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
38. 38.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
39. 39.True or false: chalk powder does not dissolve in water. (a) True (b) False
40. 40.🛟 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

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