Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 840 · 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.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) warm water (d) a battery cell
2. 2.True or false: dissolving salt is a change that can be undone. (a) False (b) True
3. 3.True or false: cooking oil dissolves in water. (a) False (b) True
4. 4.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting butter (c) milk turning to curd (d) cooking an egg
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a battery cell (c) a balloon (d) a magnet
6. 6.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting ice (d) browning lemon ink
7. 7.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
8. 8.⚖️ 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 measure it (c) we change it
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a mirror (d) a shallow dish
10. 10.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
11. 11.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) rusting iron (c) cooking an egg (d) milk turning to curd
12. 12.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
13. 13.True or false: sand dissolves in water. (a) False (b) True
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny cubes (d) tiny stars
15. 15.⚖️ 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 salt (c) the amount of water (d) the same dish
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
17. 17.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) rusting iron (d) melting ice
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) salt (d) a shallow dish
19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
20. 20.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) chalk powder (d) sand
21. 21.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
22. 22.True or false: freezing water is a change that can be undone. (a) False (b) True
23. 23.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
24. 24.True or false: glucose powder does not dissolve in water. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sawdust (d) table salt
26. 26.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
27. 27.⚖️ 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 change it (c) we keep it the same
28. 28.⚖️ 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) days to see crystals (c) the amount of water (d) sunny or shady place
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a piece of string (d) a battery cell
30. 30.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
31. 31.🧂 Which of these dissolves in water? (a) chalk powder (b) sugar (c) small pebbles (d) cooking oil
32. 32.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a shallow dish (c) a balloon (d) turmeric powder
34. 34.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
35. 35.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) baking a cake (d) cooking an egg
36. 36.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) salt (d) a balloon
38. 38.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to make it very salty (d) to change its colour
40. 40.⚖️ 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) the same dish (c) days to see crystals

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