Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 345 · 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.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) salt (d) turmeric powder
2. 2.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🧂 Which of these dissolves in water? (a) cooking oil (b) sugar (c) sawdust (d) chalk powder
4. 4.True or false: small pebbles dissolves in water. (a) False (b) True
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a battery cell (d) a piece of string
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a battery cell (d) warm water
7. 7.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt grows roots (d) salt eats water
8. 8.⚖️ 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 change it (c) we measure it
9. 9.⚖️ 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) True (b) False
10. 10.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
11. 11.True or false: dissolving salt is a change that can be undone. (a) True (b) False
12. 12.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) food colour (d) small pebbles
14. 14.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
15. 15.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) table salt (b) sugar (c) small pebbles (d) glucose powder
17. 17.🔍 Which is the odd one out? (a) food colour (b) sugar (c) cooking oil (d) glucose powder
18. 18.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
19. 19.⚖️ 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 salt
20. 20.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a balloon (c) a magnet (d) a battery cell
22. 22.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) sand (d) cooking oil
23. 23.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
24. 24.True or false: melting ice is a change that cannot be undone. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) sawdust (d) chalk powder
26. 26.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) yeast (d) a spoon
28. 28.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
29. 29.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) rusting iron (c) melting ice (d) folding paper
30. 30.True or false: food colour dissolves in water. (a) True (b) False
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 change it (b) we keep it the same (c) we measure it
32. 32.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
33. 33.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the amount of water (d) the kind of salt
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
37. 37.⚖️ 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
38. 38.⚖️ 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 measure it (c) we keep it the same
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) a piece of string (d) a spoon
40. 40.🔮 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

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