Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 928 · 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.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
3. 3.🧂 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
4. 4.True or false: salt is not needed for growing salt crystals. (a) False (b) True
5. 5.⚖️ 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 same dish (b) sunny or shady place (c) the kind of salt (d) days to see crystals
6. 6.🔍 Which is the odd one out? (a) glucose powder (b) sawdust (c) baking soda (d) food colour
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
8. 8.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
9. 9.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a mirror (c) a magnet (d) a battery cell
10. 10.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
11. 11.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) melting ice (d) cooking an egg
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 change it (c) we measure it
13. 13.⚖️ 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
14. 14.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) browning lemon ink (d) melting butter
15. 15.True or false: baking soda does not dissolve in water. (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) days to see crystals (b) sunny or shady place (c) the amount of water
17. 17.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
18. 18.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) baking soda (d) small pebbles
20. 20.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
21. 21.⚖️ 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) the amount of salt (c) days to see crystals (d) sunny or shady place
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a mirror (d) a piece of string
23. 23.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) chalk powder (d) sugar
24. 24.True or false: small pebbles does not dissolve in water. (a) False (b) True
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a spoon (d) a shallow dish
27. 27.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
28. 28.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) cooking an egg (c) rusting iron (d) browning lemon ink
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a spoon (d) yeast
30. 30.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) melting ice (d) folding paper
33. 33.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) folding paper (c) dissolving salt (d) melting ice
34. 34.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
35. 35.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
36. 36.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
37. 37.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
38. 38.True or false: melting butter is a change that cannot be undone. (a) False (b) True
39. 39.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) glucose powder (d) sugar
40. 40.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a magnet (d) a spoon

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