Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 718 · 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.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
2. 2.⚖️ 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 salt (b) days to see crystals (c) sunny or shady place
3. 3.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) chalk powder (d) small pebbles
4. 4.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) melting ice (d) melting butter
5. 5.⚖️ 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
6. 6.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
7. 7.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
8. 8.True or false: sawdust dissolves in water. (a) False (b) True
9. 9.True or false: melting ice is a change that can be undone. (a) True (b) False
10. 10.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a magnet (c) salt (d) a piece of string
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) turmeric powder (d) salt
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) a piece of string (d) a spoon
18. 18.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
19. 19.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
20. 20.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
21. 21.True or false: folding paper is a change that can be undone. (a) False (b) True
22. 22.⚖️ 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
23. 23.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a balloon (d) salt
25. 25.⚖️ 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 keep it the same (b) we change it (c) we measure it
26. 26.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) sand (d) glucose powder
27. 27.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) food colour (d) cooking oil
28. 28.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
29. 29.True or false: sand dissolves in water. (a) True (b) False
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
31. 31.⚖️ 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 same dish
32. 32.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a battery cell (d) a spoon
34. 34.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) no crystals (d) liquid crystals
35. 35.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
37. 37.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) salt (d) a battery cell
39. 39.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ 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 amount of salt (b) the amount of water (c) the same dish (d) sunny or shady place

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