Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 701 · 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.⚖️ 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) the amount of salt (d) sunny or shady place
2. 2.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) melting butter
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) a spoon (d) turmeric powder
4. 4.True or false: melting ice is a change that cannot be undone. (a) True (b) False
5. 5.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place (d) the kind of salt
6. 6.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) cooking oil (d) sawdust
8. 8.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) sand (d) glucose powder
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) a balloon
10. 10.⚖️ 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 change it (c) we keep it the same
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a balloon (d) warm water
12. 12.True or false: food colour does not dissolve in water. (a) False (b) True
13. 13.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
14. 14.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
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) next to the baby (d) safe from small children
16. 16.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) warm water (d) a shallow dish
19. 19.True or false: warm water is needed for growing salt crystals. (a) True (b) False
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) turmeric powder (d) a battery cell
22. 22.⚖️ 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 measure it (c) we keep it the same
23. 23.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) salt (d) a battery cell
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 change it (b) we measure it (c) we keep it the same
27. 27.True or false: salt is needed for growing salt crystals. (a) True (b) False
28. 28.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a shallow dish (d) salt
30. 30.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sand (c) food colour (d) table salt
31. 31.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) it turns sweet (d) few or no crystals
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a mirror (d) a piece of string
33. 33.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
34. 34.🧺 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) yeast
35. 35.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
36. 36.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) smaller crystals (c) bigger crystals (d) no crystals
37. 37.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
38. 38.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) sugar (d) food colour
39. 39.🧂 Which of these dissolves in water? (a) chalk powder (b) small pebbles (c) table salt (d) cooking oil
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a spoon (d) a shallow dish

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