Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 843 · 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: a spoon is not needed for growing salt crystals. (a) False (b) True
2. 2.True or false: baking soda dissolves in water. (a) True (b) False
3. 3.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to make it fizz (d) to cool the water
4. 4.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
5. 5.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) warm water (d) a shallow dish
7. 7.⚖️ 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 water (b) the same dish (c) sunny or shady place (d) days to see crystals
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a piece of string (d) yeast
9. 9.⚖️ 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 measure it (c) we change it
10. 10.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) cooking oil (d) glucose powder
11. 11.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) milk turning to curd (d) browning lemon ink
12. 12.True or false: rusting iron is a change that can be undone. (a) True (b) False
13. 13.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
14. 14.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) glucose powder (d) chalk powder
15. 15.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
16. 16.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
17. 17.True or false: salt is not needed for growing salt crystals. (a) True (b) False
18. 18.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a battery cell (c) a balloon (d) turmeric powder
20. 20.🔍 Which is the odd one out? (a) table salt (b) food colour (c) sugar (d) chalk powder
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
22. 22.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a balloon (c) a piece of string (d) warm water
24. 24.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a shallow dish (d) a magnet
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a spoon (d) turmeric powder
27. 27.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) salt (d) a magnet
28. 28.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a spoon (c) a shallow dish (d) a piece of string
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a mirror (c) warm water (d) a spoon
32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
33. 33.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
34. 34.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
35. 35.⚖️ 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) sunny or shady place (b) the amount of water (c) the kind of salt (d) days to see crystals
36. 36.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a spoon (d) warm water
38. 38.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
39. 39.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a shallow dish (d) a balloon

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