Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 444 · 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 cannot be undone? (a) folding paper (b) cooking an egg (c) melting ice (d) melting butter
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
3. 3.⚖️ 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
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a piece of string (d) yeast
6. 6.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) melting ice (d) freezing water
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
8. 8.🧂 Which of these does not dissolve in water? (a) table salt (b) sawdust (c) baking soda (d) glucose powder
9. 9.True or false: salt is needed for growing salt crystals. (a) False (b) True
10. 10.True or false: chalk powder does not dissolve in water. (a) True (b) False
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) salt (d) a piece of string
12. 12.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting ice (c) melting butter (d) dissolving salt
13. 13.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
16. 16.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) sawdust (d) cooking oil
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 measure it (b) we keep it the same (c) we change 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) sunny or shady place (b) days to see crystals (c) the same dish (d) the amount of salt
19. 19.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.⚖️ 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
21. 21.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
23. 23.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
24. 24.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a mirror (d) a spoon
26. 26.⚖️ 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 change it (c) we keep it the same
27. 27.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
28. 28.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
29. 29.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) cooking oil (d) glucose powder
30. 30.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) sand
34. 34.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a magnet (d) salt
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) turmeric powder (d) warm water
36. 36.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a balloon (d) a spoon
38. 38.True or false: small pebbles dissolves in water. (a) True (b) False
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a spoon (d) a battery cell
40. 40.⚖️ 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

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