Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 161 · 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.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
2. 2.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a battery cell (c) a spoon (d) yeast
3. 3.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) dissolving salt (d) browning lemon ink
4. 4.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a balloon (d) salt
7. 7.🧂 Which of these dissolves in water? (a) small pebbles (b) sand (c) chalk powder (d) baking soda
8. 8.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
9. 9.🔍 Which is the odd one out? (a) sand (b) table salt (c) chalk powder (d) sawdust
10. 10.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
11. 11.True or false: sawdust does not dissolve in water. (a) True (b) False
12. 12.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to change its colour (d) to make it fizz
13. 13.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
14. 14.🧈 Which of these is a change that can be undone? (a) baking a cake (b) freezing water (c) rusting iron (d) cooking an egg
15. 15.True or false: sugar dissolves in water. (a) True (b) False
16. 16.🧂 Which of these dissolves in water? (a) sand (b) sugar (c) cooking oil (d) small pebbles
17. 17.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
18. 18.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) salt (c) a battery cell (d) a mirror
20. 20.⚖️ 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) True (b) False
21. 21.True or false: baking a cake is a change that can be undone. (a) False (b) True
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a magnet (d) a piece of string
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a shallow dish (d) a battery cell
24. 24.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
25. 25.⚖️ 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 keep it the same (b) we change it (c) we measure it
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) a mirror
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
28. 28.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) table salt (d) small pebbles
29. 29.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
30. 30.⚖️ 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 change it (b) we keep it the same (c) we measure it
31. 31.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
32. 32.⚖️ 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 same dish (b) days to see crystals (c) sunny or shady place (d) the kind of salt
33. 33.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
34. 34.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
35. 35.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
36. 36.True or false: cooking an egg is a change that can be undone. (a) False (b) True
37. 37.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
39. 39.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
40. 40.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) dissolving salt (d) melting ice

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