Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 868 · 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? What do we do with “the amount of salt”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
3. 3.⚖️ 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 measure it (b) we keep it the same (c) we change it
4. 4.True or false: folding paper is a change that can be undone. (a) False (b) True
5. 5.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
6. 6.True or false: melting ice is a change that cannot be undone. (a) True (b) False
7. 7.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) fish make it (d) sea water evaporates
8. 8.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a spoon (d) a balloon
10. 10.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) table salt (d) chalk powder
11. 11.True or false: folding paper is a change that cannot be undone. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) glucose powder (d) sugar
13. 13.⚖️ 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
14. 14.True or false: freezing water is a change that can be undone. (a) False (b) True
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a spoon (d) yeast
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a mirror (d) salt
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) yeast (c) salt (d) a spoon
18. 18.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) sawdust (d) cooking oil
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
20. 20.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
21. 21.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a shallow dish (d) a magnet
25. 25.⚖️ 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 keep it the same (b) we measure it (c) we change it
26. 26.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) table salt (d) baking soda
27. 27.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
28. 28.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty
29. 29.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) table salt (d) sawdust
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) turmeric powder (d) a spoon
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
32. 32.⚖️ 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
33. 33.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) dissolving salt (d) milk turning to curd
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
35. 35.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
36. 36.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) baking a cake (d) melting butter
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
39. 39.⚖️ 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 amount of salt
40. 40.🧈 Which of these is a change that can be undone? (a) rusting iron (b) freezing water (c) milk turning to curd (d) browning lemon ink

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