Salt Crystal Experiment Worksheet

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

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