Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 486 · 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: browning lemon ink is a change that cannot be undone. (a) True (b) False
2. 2.⚖️ 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 measure it (b) we keep it the same (c) we change it
3. 3.⚖️ 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
4. 4.True or false: folding paper is a change that can be undone. (a) True (b) False
5. 5.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
7. 7.True or false: rusting iron is a change that can be undone. (a) True (b) False
8. 8.⚖️ 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 change it (b) we keep it the same (c) we measure it
9. 9.⚖️ 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
10. 10.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to make it fizz (d) to cool the water
12. 12.🧂 Which of these dissolves in water? (a) food colour (b) sawdust (c) sand (d) cooking oil
13. 13.True or false: a piece of string is not needed for growing salt crystals. (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: sunny or shady place is the one thing we change. (a) False (b) True
15. 15.⚖️ 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 kind of salt (b) the amount of salt (c) sunny or shady place (d) days to see crystals
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) yeast (d) a spoon
17. 17.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a mirror (c) a battery cell (d) a piece of string
18. 18.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) cooking oil (d) glucose powder
19. 19.True or false: small pebbles dissolves in water. (a) True (b) False
20. 20.⚖️ 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
21. 21.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
22. 22.True or false: food colour dissolves in water. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) warm water (d) a piece of string
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) turmeric powder (d) a piece of string
25. 25.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
26. 26.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
28. 28.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) freezing water (d) milk turning to curd
30. 30.True or false: baking a cake is a change that can be undone. (a) False (b) True
31. 31.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
32. 32.🧂 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a piece of string (d) warm water
34. 34.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
35. 35.True or false: baking soda does not dissolve in water. (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: sunny or shady place is what we measure. (a) False (b) True
37. 37.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) melting butter (d) browning lemon ink
38. 38.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
39. 39.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
40. 40.True or false: a balloon is needed for growing salt crystals. (a) False (b) True

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