Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 210 · 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 spheres (b) tiny cubes (c) tiny triangles (d) tiny stars
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.⚖️ 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) the amount of salt (c) the kind of salt (d) the same dish
4. 4.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
7. 7.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) small pebbles (d) sand
8. 8.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) turmeric powder (d) a piece of string
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a balloon (d) a shallow dish
12. 12.True or false: baking a cake is a change that can be undone. (a) False (b) True
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) salt (d) a mirror
14. 14.True or false: salt is needed for growing salt crystals. (a) False (b) True
15. 15.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
16. 16.⚖️ 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
17. 17.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
18. 18.⚖️ 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
19. 19.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a piece of string (d) a spoon
21. 21.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
22. 22.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) sand (d) baking soda
23. 23.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
24. 24.🧂 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) cooking oil (d) food colour
25. 25.True or false: small pebbles dissolves in water. (a) True (b) False
26. 26.True or false: sawdust dissolves in water. (a) True (b) False
27. 27.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
28. 28.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
29. 29.True or false: food colour dissolves in water. (a) True (b) False
30. 30.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
31. 31.True or false: table salt does not dissolve in water. (a) False (b) True
32. 32.🧂 Which of these does not dissolve in water? (a) sugar (b) sawdust (c) table salt (d) baking soda
33. 33.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) baking a cake (d) milk turning to curd
34. 34.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.True or false: freezing water is a change that cannot be undone. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) chalk powder (d) baking soda
37. 37.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
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) the amount of water (b) days to see crystals (c) sunny or shady place
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
40. 40.True or false: a mirror is needed for growing salt crystals. (a) True (b) False

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