Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 140 · 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: the kind of salt is the one thing we change. (a) True (b) False
2. 2.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
3. 3.True or false: baking a cake is a change that can be undone. (a) True (b) False
4. 4.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
5. 5.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) glucose powder (d) table salt
6. 6.⚖️ 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
7. 7.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
9. 9.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) table salt (d) small pebbles
11. 11.True or false: melting ice is a change that can be undone. (a) False (b) True
12. 12.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
13. 13.True or false: sugar dissolves in water. (a) True (b) False
14. 14.True or false: baking soda does not dissolve in water. (a) True (b) False
15. 15.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
16. 16.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) salt (d) warm water
17. 17.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
18. 18.⚖️ 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) False (b) True
19. 19.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) melting ice (d) melting butter
20. 20.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
21. 21.🔍 Which is the odd one out? (a) sugar (b) table salt (c) small pebbles (d) food colour
22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
24. 24.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) cooking oil (d) baking soda
25. 25.⚖️ 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
26. 26.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) dissolving salt (d) rusting iron
27. 27.True or false: sugar does not dissolve in water. (a) True (b) False
28. 28.⚖️ 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 amount of water (b) sunny or shady place (c) days to see crystals
29. 29.⚖️ 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 amount of salt (b) the kind of salt (c) days to see crystals (d) sunny or shady place
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a battery cell (d) warm water
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a battery cell (d) a piece of string
32. 32.⚖️ 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) False (b) True
33. 33.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of salt (c) sunny or shady place
35. 35.🔮 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
36. 36.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
37. 37.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) folding paper (c) melting butter (d) dissolving salt
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a mirror (d) warm water

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