Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 546 · 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.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
2. 2.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
3. 3.🧂 Which of these dissolves in water? (a) sand (b) table salt (c) chalk powder (d) small pebbles
4. 4.⚖️ 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 water (b) the amount of salt (c) sunny or shady place (d) days to see crystals
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
6. 6.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
7. 7.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
9. 9.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
10. 10.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
11. 11.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
12. 12.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) salt rains down (d) fish make it
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
14. 14.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.⚖️ 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 keep it the same (b) we measure it (c) we change it
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
17. 17.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
18. 18.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) browning lemon ink (d) melting ice
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
20. 20.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a mirror (d) warm water
22. 22.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a mirror (d) a spoon
24. 24.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) milk turning to curd (d) cooking an egg
25. 25.True or false: rusting iron is a change that can be undone. (a) True (b) False
26. 26.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) yeast (d) a piece of string
29. 29.True or false: yeast is needed for growing salt crystals. (a) False (b) True
30. 30.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
31. 31.True or false: dissolving salt is a change that can be undone. (a) False (b) True
32. 32.True or false: melting butter is a change that cannot be undone. (a) True (b) False
33. 33.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
34. 34.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) dissolving salt (c) folding paper (d) melting butter
35. 35.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sawdust (d) glucose powder
36. 36.⚖️ 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 same dish (c) days to see crystals (d) sunny or shady place
37. 37.True or false: melting ice is a change that cannot be undone. (a) False (b) True
38. 38.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
39. 39.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a spoon (d) a balloon
40. 40.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True

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