Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 86 · 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 does not dissolve in water? (a) small pebbles (b) food colour (c) glucose powder (d) sugar
2. 2.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
4. 4.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) melting butter (d) browning lemon ink
6. 6.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
7. 7.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
8. 8.True or false: salt is needed for growing salt crystals. (a) False (b) True
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a shallow dish (d) a spoon
13. 13.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) a balloon (d) yeast
14. 14.⚖️ 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
15. 15.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
16. 16.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) glucose powder (d) sand
17. 17.🧂 Which of these does not dissolve in water? (a) sand (b) glucose powder (c) table salt (d) food colour
18. 18.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) salt crystals form (d) it turns to butter
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the same dish
21. 21.True or false: sawdust does not dissolve in water. (a) False (b) True
22. 22.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a mirror (d) salt
24. 24.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) sawdust (d) food colour
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
26. 26.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) baking a cake (d) cooking an egg
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a magnet (d) a spoon
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) folding paper (d) baking a cake
30. 30.True or false: chalk powder does not dissolve in water. (a) False (b) True
31. 31.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
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 salt”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) glucose powder (d) small pebbles
34. 34.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) chalk powder (d) glucose powder
35. 35.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) table salt (d) cooking oil
36. 36.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a spoon (c) a magnet (d) a battery cell
38. 38.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) salt (d) a balloon
40. 40.True or false: sand does not dissolve in water. (a) False (b) True

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