Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 847 · 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 can be undone? (a) cooking an egg (b) rusting iron (c) milk turning to curd (d) dissolving salt
2. 2.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) small pebbles (d) baking soda
3. 3.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) table salt (d) glucose powder
4. 4.True or false: food colour dissolves in water. (a) True (b) False
5. 5.⚖️ 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) the amount of water (c) days to see crystals
6. 6.🛟 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
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) sugar (d) chalk powder
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.⚖️ 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
10. 10.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
12. 12.⚖️ 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) True (b) False
13. 13.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a magnet (d) a piece of string
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) salt (d) a spoon
16. 16.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
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 change it (b) we keep it the same (c) we measure it
18. 18.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
19. 19.⚖️ 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) sunny or shady place (c) days to see crystals (d) the same dish
20. 20.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
21. 21.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) freezing water (d) browning lemon ink
22. 22.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) fish make it (d) salt rains down
23. 23.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) rusting iron (d) dissolving salt
24. 24.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals (d) the amount of salt
25. 25.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
26. 26.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
27. 27.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) melting butter (d) browning lemon ink
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a piece of string (d) yeast
29. 29.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
30. 30.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) chalk powder (d) baking soda
31. 31.True or false: rusting iron is a change that can be undone. (a) True (b) False
32. 32.True or false: glucose powder dissolves in water. (a) False (b) True
33. 33.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) dissolving salt (d) freezing water
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
35. 35.🔮 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
36. 36.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
37. 37.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a battery cell (d) a piece of string
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) warm water (d) a battery cell
40. 40.⚖️ 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 amount of salt

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