Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 566 · 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 is the odd one out? (a) cooking oil (b) small pebbles (c) sawdust (d) glucose powder
2. 2.⚖️ 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) True (b) False
3. 3.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) baking soda (d) table salt
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a piece of string (c) a spoon (d) a shallow dish
6. 6.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a mirror (c) warm water (d) a balloon
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
9. 9.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
10. 10.True or false: sawdust does not dissolve in water. (a) True (b) False
11. 11.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
12. 12.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
13. 13.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
14. 14.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
15. 15.⚖️ 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 same dish (b) the amount of water (c) days to see crystals (d) sunny or shady place
16. 16.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
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.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) cooking an egg (c) dissolving salt (d) freezing water
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a battery cell (c) a spoon (d) a piece of string
20. 20.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) sugar (d) chalk powder
22. 22.True or false: baking a cake is a change that can be undone. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a spoon (c) warm water (d) a piece of string
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a magnet (d) a spoon
25. 25.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a balloon (d) a spoon
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) no crystals (d) bigger crystals
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) salt (d) a shallow dish
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) rusting iron (d) dissolving salt
30. 30.⚖️ 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 same dish (c) the kind of salt (d) days to see crystals
31. 31.⚖️ 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 keep it the same (b) we change it (c) we measure it
32. 32.⚖️ 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 change it (c) we keep it the same
33. 33.⚖️ 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
34. 34.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
35. 35.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) sawdust (d) sand
36. 36.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
38. 38.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
39. 39.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
40. 40.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child

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