Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 319 · 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 a change that cannot be undone? (a) folding paper (b) rusting iron (c) freezing water (d) melting butter
2. 2.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) baking soda (d) cooking oil
3. 3.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.True or false: dissolving salt is a change that can be undone. (a) False (b) True
5. 5.⚖️ 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
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a shallow dish (d) a battery cell
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
9. 9.⚖️ 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 keep it the same (c) we change it
10. 10.True or false: small pebbles dissolves in water. (a) True (b) False
11. 11.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
12. 12.🔮 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
13. 13.True or false: warm water is needed for growing salt crystals. (a) True (b) False
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
15. 15.🧂 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
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.True or false: table salt dissolves in water. (a) True (b) False
18. 18.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
19. 19.⚖️ 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) False (b) True
20. 20.⚖️ 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 water (b) sunny or shady place (c) days to see crystals (d) the amount of salt
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) salt (c) yeast (d) a mirror
22. 22.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
23. 23.True or false: baking a cake is a change that can be undone. (a) True (b) False
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a shallow dish (d) a piece of string
25. 25.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) folding paper (d) freezing water
26. 26.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) chalk powder (d) table salt
27. 27.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sugar (d) cooking oil
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a balloon (d) salt
30. 30.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) table salt (d) food colour
31. 31.True or false: sawdust does not dissolve in water. (a) False (b) True
32. 32.True or false: rusting iron is a change that can be undone. (a) False (b) True
33. 33.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) cooking an egg (d) melting butter
34. 34.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
35. 35.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
36. 36.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
37. 37.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
38. 38.⚖️ 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) the kind of salt (c) sunny or shady place
39. 39.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) salt (d) a magnet

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