Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 73 · 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 dissolves in water? (a) food colour (b) cooking oil (c) sand (d) sawdust
2. 2.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
3. 3.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) milk turning to curd (d) freezing water
4. 4.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) turmeric powder (d) salt
6. 6.True or false: baking a cake is a change that can be undone. (a) True (b) False
7. 7.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
9. 9.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a shallow dish (d) a mirror
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
12. 12.True or false: food colour does not dissolve in water. (a) True (b) False
13. 13.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) chalk powder (d) glucose powder
14. 14.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
15. 15.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
16. 16.True or false: table salt does not dissolve in water. (a) True (b) False
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 salt”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.⚖️ 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 amount of salt (c) the kind of salt (d) days to see crystals
19. 19.True or false: sugar does not dissolve in water. (a) False (b) True
20. 20.🛟 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
21. 21.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) sugar (d) small pebbles
23. 23.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a magnet (d) warm water
25. 25.True or false: sugar dissolves in water. (a) False (b) True
26. 26.🧺 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
27. 27.⚖️ 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 amount of water (b) days to see crystals (c) sunny or shady place
28. 28.⚖️ 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
29. 29.True or false: food colour dissolves in water. (a) True (b) False
30. 30.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) table salt (d) small pebbles
31. 31.🔍 Which is the odd one out? (a) sawdust (b) glucose powder (c) baking soda (d) table salt
32. 32.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
33. 33.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
34. 34.⚖️ 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 kind of salt (c) the same dish (d) the amount of water
35. 35.⚖️ 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 amount of salt (b) sunny or shady place (c) days to see crystals
36. 36.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
39. 39.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a balloon (d) warm water
40. 40.⚖️ 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 change it (b) we measure it (c) we keep it the same

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