Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 830 · 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.🧂 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 very salty (d) to make it fizz
2. 2.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
3. 3.True or false: sand does not dissolve in water. (a) False (b) True
4. 4.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
6. 6.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
8. 8.⚖️ 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 amount of salt (c) the same dish (d) days to see crystals
9. 9.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) baking a cake (d) melting ice
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a battery cell (d) a shallow dish
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
13. 13.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) folding paper (d) freezing water
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) salt (d) a battery cell
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a battery cell (c) turmeric powder (d) a mirror
16. 16.🧂 Which of these dissolves in water? (a) cooking oil (b) food colour (c) sawdust (d) chalk powder
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) a piece of string (d) a shallow dish
18. 18.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
19. 19.True or false: food colour dissolves in water. (a) False (b) True
20. 20.True or false: yeast is needed for growing salt crystals. (a) False (b) True
21. 21.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
22. 22.⚖️ 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) the kind of salt (b) the same dish (c) sunny or shady place (d) days to see crystals
23. 23.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
24. 24.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
25. 25.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) glucose powder (d) sand
27. 27.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) folding paper (d) melting butter
28. 28.⚖️ 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 measure it (c) we change it
29. 29.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a mirror (c) a balloon (d) a battery cell
30. 30.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) a battery cell (d) salt
32. 32.True or false: folding paper is a change that can be undone. (a) True (b) False
33. 33.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) baking a cake (c) milk turning to curd (d) cooking an egg
34. 34.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.⚖️ 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) True (b) False
36. 36.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
37. 37.⚖️ 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 kind of salt
38. 38.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a piece of string (d) a mirror
40. 40.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed

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