Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 85 · 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? True or false: sunny or shady place is what we measure. (a) True (b) False
2. 2.🧈 Which of these is a change that can be undone? (a) freezing water (b) cooking an egg (c) browning lemon ink (d) milk turning to curd
3. 3.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
4. 4.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) salt rains down (d) sand is ground up
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) warm water (d) a spoon
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) salt (d) warm water
7. 7.🧺 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) turmeric powder
8. 8.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
9. 9.🧂 Which of these does not dissolve in water? (a) baking soda (b) sawdust (c) sugar (d) table salt
10. 10.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
11. 11.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
12. 12.⚖️ 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) sunny or shady place (c) days to see crystals (d) the amount of water
13. 13.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
14. 14.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it turns sweet (d) it fizzes
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) a piece of string (d) a shallow dish
16. 16.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sugar (d) chalk powder
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a mirror
18. 18.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) chalk powder (b) baking soda (c) small pebbles (d) sawdust
21. 21.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
22. 22.⚖️ 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) days to see crystals (b) sunny or shady place (c) the amount of salt (d) the amount of water
23. 23.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting ice (c) melting butter (d) dissolving salt
24. 24.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
26. 26.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sugar (d) table salt
27. 27.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) chalk powder (d) cooking oil
28. 28.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) turmeric powder (d) a piece of string
29. 29.⚖️ 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
30. 30.True or false: yeast is needed for growing salt crystals. (a) False (b) True
31. 31.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a piece of string (d) a balloon
36. 36.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
38. 38.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False

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