Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 248 · 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: freezing water is a change that can be undone. (a) True (b) False
2. 2.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
3. 3.True or false: chalk powder does not dissolve in water. (a) True (b) False
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a shallow dish (c) yeast (d) warm water
5. 5.🔍 Which is the odd one out? (a) table salt (b) sand (c) small pebbles (d) sawdust
6. 6.True or false: baking soda dissolves in water. (a) False (b) True
7. 7.True or false: sugar does not dissolve in water. (a) False (b) True
8. 8.🧺 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) turmeric powder
9. 9.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
10. 10.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
11. 11.⚖️ 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 change it (b) we keep it the same (c) we measure it
12. 12.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
13. 13.True or false: cooking oil does not dissolve in water. (a) True (b) False
14. 14.True or false: melting ice is a change that cannot be undone. (a) True (b) False
15. 15.🛟 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
16. 16.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a shallow dish (d) a spoon
18. 18.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
19. 19.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
20. 20.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) folding paper (d) browning lemon ink
21. 21.⚖️ 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 measure it (c) we change it
22. 22.🧂 Which of these dissolves in water? (a) sawdust (b) sugar (c) sand (d) cooking oil
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) a spoon (d) a piece of string
24. 24.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) milk turning to curd (c) folding paper (d) melting butter
25. 25.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) sugar (d) table salt
26. 26.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
28. 28.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
30. 30.True or false: freezing water is a change that cannot be undone. (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: the amount of salt is what we measure. (a) False (b) True
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
33. 33.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
34. 34.True or false: baking soda does not dissolve in water. (a) False (b) True
35. 35.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sand is ground up (d) sea water evaporates
36. 36.True or false: cooking an egg is a change that can be undone. (a) False (b) True
37. 37.True or false: dissolving salt is a change that can be undone. (a) False (b) True
38. 38.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) small pebbles (d) baking soda
39. 39.⚖️ 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) False (b) True
40. 40.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) dissolving salt (d) milk turning to curd

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