Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 897 · 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.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) a shallow dish
4. 4.⚖️ 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 keep it the same (c) we change it
5. 5.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
6. 6.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) dissolving salt (d) cooking an egg
7. 7.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) browning lemon ink (d) milk turning to curd
9. 9.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) small pebbles (d) glucose powder
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) yeast (d) warm water
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the kind of salt (c) the same dish (d) days to see crystals
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
13. 13.True or false: melting ice is a change that can be undone. (a) False (b) True
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sawdust (d) glucose powder
16. 16.⚖️ 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 change it (c) we measure it
17. 17.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
18. 18.🧂 Which of these dissolves in water? (a) small pebbles (b) food colour (c) cooking oil (d) chalk powder
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a mirror (d) a piece of string
20. 20.🧂 Which of these dissolves in water? (a) sugar (b) cooking oil (c) small pebbles (d) chalk powder
21. 21.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
22. 22.True or false: food colour does not dissolve in water. (a) True (b) False
23. 23.🧂 Which of these does not dissolve in water? (a) table salt (b) sawdust (c) food colour (d) baking soda
24. 24.True or false: sand does not dissolve in water. (a) False (b) True
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) turmeric powder (d) a shallow dish
26. 26.🛟 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
27. 27.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
28. 28.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
29. 29.True or false: baking soda dissolves in water. (a) False (b) True
30. 30.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
31. 31.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
32. 32.⚖️ 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
33. 33.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
35. 35.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) folding paper (d) cooking an egg
37. 37.True or false: sand dissolves in water. (a) True (b) False
38. 38.⚖️ 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 water (b) the amount of salt (c) the kind of salt (d) sunny or shady place
39. 39.True or false: melting butter is a change that cannot be undone. (a) False (b) True
40. 40.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots

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