Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 424 · 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.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
2. 2.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) turmeric powder (d) salt
4. 4.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
5. 5.🔮 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
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) salt (d) a spoon
8. 8.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
9. 9.⚖️ 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) True (b) False
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a piece of string (d) a magnet
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
12. 12.True or false: rusting iron is a change that can be undone. (a) False (b) True
13. 13.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
15. 15.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
16. 16.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
17. 17.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) milk turning to curd (d) rusting iron
18. 18.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
19. 19.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sugar (d) sand
20. 20.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) salt (c) turmeric powder (d) a battery cell
21. 21.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
22. 22.True or false: small pebbles does not dissolve in water. (a) True (b) False
23. 23.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
24. 24.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) browning lemon ink (d) melting butter
25. 25.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) freezing water (d) cooking an egg
26. 26.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) small pebbles (d) table salt
27. 27.⚖️ 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
28. 28.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a balloon (d) salt
29. 29.🔍 Which is the odd one out? (a) sugar (b) table salt (c) food colour (d) small pebbles
30. 30.🔮 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
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) a spoon (d) warm water
32. 32.🔍 Which is the odd one out? (a) table salt (b) sand (c) sugar (d) food colour
33. 33.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) melting ice (d) rusting iron
35. 35.🛟 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
36. 36.⚖️ 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 measure it (b) we keep it the same (c) we change it
37. 37.True or false: salt is not needed for growing salt crystals. (a) True (b) False
38. 38.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
40. 40.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) cooking oil (d) sawdust

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