Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 598 · 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 kept the same. (a) False (b) True
2. 2.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
4. 4.True or false: table salt dissolves in water. (a) False (b) True
5. 5.⚖️ 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 measure it (b) we keep it the same (c) we change it
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.⚖️ 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 water (c) the amount of salt (d) days to see crystals
9. 9.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
10. 10.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) browning lemon ink (d) baking a cake
11. 11.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) glucose powder (d) small pebbles
12. 12.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
13. 13.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
14. 14.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) salt (d) a piece of string
16. 16.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) it turns sweet (d) crystals grow faster
17. 17.⚖️ 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 measure it (b) we keep it the same (c) we change it
18. 18.True or false: baking a cake is a change that can be undone. (a) True (b) False
19. 19.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) melting butter (d) cooking an egg
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
21. 21.⚖️ 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) False (b) True
22. 22.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
23. 23.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) melting butter (d) rusting iron
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
25. 25.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
26. 26.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) sawdust (d) table salt
27. 27.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
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) False (b) True
29. 29.True or false: small pebbles dissolves in water. (a) True (b) False
30. 30.True or false: melting butter is a change that can be undone. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) sawdust (d) cooking oil
32. 32.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
33. 33.🧈 Which of these is a change that can be undone? (a) freezing water (b) milk turning to curd (c) rusting iron (d) baking a cake
34. 34.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) sawdust (d) food colour
35. 35.True or false: salt is not needed for growing salt crystals. (a) True (b) False
36. 36.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
37. 37.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) food colour (d) sugar
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a mirror (d) warm water
39. 39.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny triangles (c) tiny stars (d) tiny spheres
40. 40.⚖️ 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 water (b) the kind of salt (c) sunny or shady place (d) days to see crystals

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