Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 320 · 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.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
2. 2.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sugar (d) table salt
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
7. 7.⚖️ 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
8. 8.True or false: rusting iron is a change that can be undone. (a) False (b) True
9. 9.⚖️ 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) the same dish (c) days to see crystals (d) sunny or shady place
10. 10.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
11. 11.True or false: sugar dissolves in water. (a) True (b) False
12. 12.⚖️ 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 measure it (b) we change it (c) we keep it the same
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
15. 15.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a mirror (c) a magnet (d) a piece of string
16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
17. 17.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
18. 18.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a spoon (c) salt (d) a piece of string
20. 20.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
21. 21.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) yeast (c) a shallow dish (d) salt
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) a battery cell (d) a magnet
25. 25.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a mirror (c) warm water (d) a spoon
27. 27.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) cooking oil (d) food colour
28. 28.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
29. 29.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) warm water (d) a spoon
31. 31.⚖️ 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) days to see crystals (c) the kind of salt (d) the amount of water
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) salt (d) a magnet
33. 33.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
34. 34.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
35. 35.True or false: table salt dissolves in water. (a) False (b) True
36. 36.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a piece of string (d) salt
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
39. 39.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
40. 40.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone

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