Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 114 · 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.True or false: sawdust dissolves in water. (a) True (b) False
2. 2.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a magnet (d) a piece of string
3. 3.⚖️ 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
4. 4.True or false: melting ice is a change that cannot be undone. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) sand (d) chalk powder
6. 6.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.⚖️ 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) days to see crystals (c) the amount of water (d) the kind of salt
8. 8.True or false: baking a cake is a change that can be undone. (a) True (b) False
9. 9.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
11. 11.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) warm water (d) yeast
13. 13.🧈 Which of these is a change that can be undone? (a) melting butter (b) rusting iron (c) milk turning to curd (d) cooking an egg
14. 14.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
15. 15.⚖️ 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
16. 16.⚖️ 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) the same dish (d) days to see crystals
17. 17.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
18. 18.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
19. 19.⚖️ 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 keep it the same (b) we measure it (c) we change it
20. 20.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
21. 21.⚖️ 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
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a magnet (d) salt
24. 24.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a shallow dish (d) a battery cell
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
26. 26.True or false: table salt dissolves in water. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) table salt (b) sugar (c) baking soda (d) sawdust
28. 28.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
29. 29.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
30. 30.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
31. 31.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
32. 32.True or false: glucose powder does not dissolve in water. (a) True (b) False
33. 33.True or false: dissolving salt is a change that can be undone. (a) False (b) True
34. 34.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
35. 35.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.⚖️ 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 salt
37. 37.True or false: freezing water is a change that can be undone. (a) True (b) False
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
39. 39.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.True or false: sand does not dissolve in water. (a) False (b) True

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