Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 533 · 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.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
3. 3.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
4. 4.⚖️ 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 amount of water
5. 5.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
6. 6.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
8. 8.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
11. 11.⚖️ 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 keep it the same (c) we measure it
12. 12.True or false: sand does not dissolve in water. (a) True (b) False
13. 13.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
14. 14.⚖️ 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) sunny or shady place (c) the kind of salt
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) warm water (d) a piece of string
16. 16.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) food colour (d) table salt
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
18. 18.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
19. 19.True or false: salt is not needed for growing salt crystals. (a) True (b) False
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 kind of salt (b) sunny or shady place (c) the amount of water (d) days to see crystals
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a spoon (d) a magnet
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) warm water (d) a spoon
23. 23.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
24. 24.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
25. 25.🧂 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) glucose powder (d) baking soda
26. 26.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) small pebbles (d) cooking oil
27. 27.⚖️ 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
28. 28.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sand (d) table salt
29. 29.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) sugar (d) food colour
30. 30.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) cooking oil (d) sand
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) a magnet (d) warm water
32. 32.⚖️ 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 keep it the same (b) we measure it (c) we change it
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
34. 34.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) milk turning to curd (d) melting ice
35. 35.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) sugar (d) food colour
36. 36.True or false: baking a cake is a change that can be undone. (a) False (b) True
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) a magnet (d) a battery cell
38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
39. 39.⚖️ 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 measure it (c) we change it
40. 40.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone

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