Salt Crystal Experiment Worksheet

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

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