Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 508 · 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.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
3. 3.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a shallow dish (c) a balloon (d) a magnet
4. 4.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
5. 5.⚖️ 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
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a spoon (c) a battery cell (d) turmeric powder
7. 7.🧂 Which of these does not dissolve in water? (a) chalk powder (b) food colour (c) table salt (d) baking soda
8. 8.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
9. 9.🔍 Which is the odd one out? (a) sand (b) sawdust (c) food colour (d) chalk powder
10. 10.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) dissolving salt (c) milk turning to curd (d) melting ice
11. 11.True or false: warm water is needed for growing salt crystals. (a) False (b) True
12. 12.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) table salt (d) sand
13. 13.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a balloon (d) salt
15. 15.True or false: melting butter is a change that cannot be undone. (a) False (b) True
16. 16.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
17. 17.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) warm water (c) a magnet (d) turmeric powder
18. 18.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
19. 19.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
20. 20.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
21. 21.⚖️ 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
22. 22.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
23. 23.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) sand (d) chalk powder
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
25. 25.True or false: sawdust dissolves in water. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) sand (b) sugar (c) chalk powder (d) cooking oil
27. 27.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a shallow dish (d) a battery cell
29. 29.True or false: cooking an egg is a change that can be undone. (a) True (b) False
30. 30.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) days to see crystals (c) the amount of water (d) the kind of salt
32. 32.⚖️ 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) sunny or shady place (c) the same dish
33. 33.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
34. 34.True or false: freezing water is a change that can 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 amount of salt (d) days to see crystals
36. 36.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
37. 37.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
38. 38.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) baking a cake (d) browning lemon ink
39. 39.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
40. 40.True or false: salt is needed for growing salt crystals. (a) True (b) False

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