Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 509 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) warm water (d) a battery cell
2. 2.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) True (b) False
4. 4.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
6. 6.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
7. 7.True or false: small pebbles dissolves in water. (a) True (b) False
8. 8.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
9. 9.🧂 Which of these dissolves in water? (a) food colour (b) sawdust (c) small pebbles (d) cooking oil
10. 10.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sugar (c) small pebbles (d) baking soda
11. 11.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
12. 12.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) water evaporates (c) the dish melts (d) salt eats water
13. 13.⚖️ 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 same dish
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) yeast
15. 15.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
17. 17.True or false: folding paper is a change that cannot be undone. (a) False (b) True
18. 18.True or false: cooking an egg is a change that can be undone. (a) True (b) False
19. 19.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
20. 20.⚖️ 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 salt
21. 21.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
22. 22.True or false: sugar does not dissolve in water. (a) False (b) True
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) a spoon (d) warm water
24. 24.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) cooking oil (d) sawdust
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a piece of string (c) warm water (d) salt
26. 26.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) warm water (d) turmeric powder
27. 27.⚖️ 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 water (c) days to see crystals (d) the amount of salt
28. 28.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) table salt (d) sawdust
29. 29.🔍 Which is the odd one out? (a) sugar (b) food colour (c) glucose powder (d) sawdust
30. 30.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) warm water (d) a piece of string
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a shallow dish (d) a spoon
33. 33.🧈 Which of these is a change that can be undone? (a) freezing water (b) baking a cake (c) cooking an egg (d) milk turning to curd
34. 34.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
36. 36.⚖️ 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 measure it (c) we change it
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a shallow dish (d) turmeric powder
38. 38.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) salt rains down (d) sea water evaporates
39. 39.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) chalk powder (d) small pebbles
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a piece of string (d) a magnet

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