Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 454 · 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.True or false: melting ice is a change that cannot be undone. (a) False (b) True
2. 2.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
4. 4.⚖️ 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 change it (c) we keep it the same
5. 5.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
6. 6.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
7. 7.True or false: sugar does not dissolve in water. (a) False (b) True
8. 8.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
9. 9.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) cooking oil (d) food colour
10. 10.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🧈 Which of these is a change that can be undone? (a) melting ice (b) rusting iron (c) cooking an egg (d) milk turning to curd
12. 12.⚖️ 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
13. 13.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sugar (d) sawdust
14. 14.True or false: dissolving salt is a change that can be undone. (a) True (b) False
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) yeast (d) a piece of string
16. 16.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the same dish (d) the amount of water
18. 18.⚖️ 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) False (b) True
19. 19.⚖️ 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
20. 20.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
21. 21.⚖️ 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) the amount of salt (c) sunny or shady place (d) the same dish
22. 22.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) freezing water (d) browning lemon ink
23. 23.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a spoon (c) warm water (d) a shallow dish
25. 25.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
26. 26.⚖️ 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) the amount of water (c) days to see crystals
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) warm water (d) turmeric powder
28. 28.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) a magnet (d) a spoon
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) few or no crystals (d) it turns sweet
31. 31.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) warm water (c) a piece of string (d) salt
33. 33.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
34. 34.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) cooking oil (d) table salt
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) warm water (d) yeast
36. 36.True or false: salt is not needed for growing salt crystals. (a) False (b) True
37. 37.⚖️ 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
38. 38.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
40. 40.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) sand (d) cooking oil

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