Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 214 · 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.⚖️ 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 same dish (b) sunny or shady place (c) days to see crystals
2. 2.🧂 Which of these dissolves in water? (a) small pebbles (b) food colour (c) chalk powder (d) sand
3. 3.True or false: salt is needed for growing salt crystals. (a) True (b) False
4. 4.🌊 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
5. 5.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a shallow dish (d) a piece of string
9. 9.True or false: small pebbles does not dissolve in water. (a) False (b) True
10. 10.🧂 Which of these does not dissolve in water? (a) food colour (b) baking soda (c) chalk powder (d) table salt
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
14. 14.🔍 Which is the odd one out? (a) sand (b) sugar (c) small pebbles (d) cooking oil
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) warm water (d) a spoon
16. 16.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
17. 17.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
18. 18.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
19. 19.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
22. 22.⚖️ 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
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) glucose powder (d) cooking oil
25. 25.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
26. 26.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) table salt (d) chalk powder
27. 27.True or false: rusting iron is a change that can be undone. (a) True (b) False
28. 28.True or false: sugar dissolves in water. (a) False (b) True
29. 29.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
30. 30.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
33. 33.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
34. 34.True or false: melting ice is a change that cannot be undone. (a) False (b) True
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a magnet (d) a piece of string
36. 36.True or false: small pebbles dissolves in water. (a) False (b) True
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) a piece of string (d) turmeric powder
39. 39.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
40. 40.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed

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