Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 933 · 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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a piece of string (d) a magnet
3. 3.🛟 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
4. 4.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
5. 5.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) rusting iron (c) folding paper (d) dissolving salt
7. 7.True or false: sawdust dissolves in water. (a) False (b) True
8. 8.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) milk turning to curd (d) melting butter
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a piece of string (d) a spoon
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a shallow dish (d) turmeric powder
12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
14. 14.True or false: chalk powder dissolves in water. (a) True (b) False
15. 15.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
16. 16.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) sawdust (d) baking soda
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
18. 18.True or false: baking a cake is a change that can be undone. (a) True (b) False
19. 19.True or false: table salt dissolves in water. (a) True (b) False
20. 20.True or false: sand dissolves in water. (a) True (b) False
21. 21.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
23. 23.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
24. 24.True or false: baking soda dissolves in water. (a) True (b) False
25. 25.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) baking a cake (d) browning lemon ink
26. 26.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
27. 27.True or false: baking soda does not dissolve in water. (a) True (b) False
28. 28.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
29. 29.True or false: melting butter is a change that cannot be undone. (a) True (b) False
30. 30.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
31. 31.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
32. 32.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🧂 Which of these dissolves in water? (a) sand (b) glucose powder (c) sawdust (d) chalk powder
36. 36.⚖️ 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 amount of salt (b) the same dish (c) sunny or shady place (d) the kind of salt
37. 37.⚖️ 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
38. 38.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) sugar (d) small pebbles
39. 39.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) glucose powder (d) small pebbles
40. 40.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) milk turning to curd (d) browning lemon ink

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