Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 162 · 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 is the odd one out? (a) sand (b) food colour (c) sawdust (d) chalk powder
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) salt (c) a piece of string (d) a spoon
3. 3.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
4. 4.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) sugar (d) chalk powder
5. 5.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) yeast (c) turmeric powder (d) a balloon
9. 9.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
10. 10.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) cooking oil (d) food colour
11. 11.True or false: salt is needed for growing salt crystals. (a) False (b) True
12. 12.True or false: sawdust dissolves in water. (a) False (b) True
13. 13.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) turmeric powder (d) warm water
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
15. 15.🧂 Which of these does not dissolve in water? (a) sugar (b) sand (c) food colour (d) glucose powder
16. 16.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) melting ice (d) baking a cake
17. 17.🧺 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) turmeric powder
18. 18.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
19. 19.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) rusting iron (c) milk turning to curd (d) cooking an egg
20. 20.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) a shallow dish (d) warm water
23. 23.True or false: warm water is needed for growing salt crystals. (a) False (b) True
24. 24.🧈 Which of these is a change that can be undone? (a) freezing water (b) browning lemon ink (c) cooking an egg (d) baking a cake
25. 25.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.True or false: freezing water is a change that can be undone. (a) False (b) True
27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
28. 28.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
29. 29.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.True or false: melting butter is a change that can be undone. (a) False (b) True
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) a battery cell
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) the amount of salt (b) sunny or shady place (c) days to see crystals
33. 33.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
34. 34.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) sugar (d) glucose powder
35. 35.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) magnetic (c) frozen (d) saturated
36. 36.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a magnet (c) a mirror (d) a balloon
38. 38.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
39. 39.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) dissolving salt (d) folding paper
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same

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