Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 767 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
3. 3.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a spoon (c) a piece of string (d) yeast
5. 5.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
6. 6.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it fizz (c) to make it very salty (d) to cool the water
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) a magnet (d) yeast
8. 8.🧺 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) turmeric powder
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
11. 11.⚖️ 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
12. 12.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) baking soda (d) sand
13. 13.True or false: melting ice is a change that can be undone. (a) False (b) True
14. 14.⚖️ 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) False (b) True
15. 15.True or false: baking soda does not dissolve in water. (a) True (b) False
16. 16.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) sawdust (d) sand
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) the same dish (b) the amount of water (c) days to see crystals (d) sunny or shady place
18. 18.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sawdust (d) glucose powder
19. 19.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
20. 20.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a shallow dish (d) a balloon
22. 22.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
23. 23.⚖️ 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) days to see crystals (c) sunny or shady place (d) the kind of salt
24. 24.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) cooking an egg (c) browning lemon ink (d) milk turning to curd
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) sunny or shady place (c) days to see crystals
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
28. 28.⚖️ 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
29. 29.True or false: melting ice is a change that cannot be undone. (a) False (b) True
30. 30.True or false: freezing water is a change that cannot be undone. (a) True (b) False
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) warm water (d) salt
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a mirror (d) warm water
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 what we measure. (a) True (b) False
34. 34.True or false: cooking oil does not dissolve in water. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) cooking oil (d) small pebbles
36. 36.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) sand is ground up (d) fish make it
37. 37.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) frozen (d) magnetic
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
39. 39.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) melting ice (d) browning lemon ink
40. 40.⚖️ 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 keep it the same (b) we change it (c) we measure it

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