Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 886 · 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.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) milk turning to curd (d) dissolving salt
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of salt
3. 3.⚖️ 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 change it (b) we keep it the same (c) we measure it
4. 4.True or false: cooking oil dissolves in water. (a) False (b) True
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) the amount of water (c) days to see crystals
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a piece of string (d) a battery cell
7. 7.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
8. 8.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) cooking oil (d) food colour
10. 10.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
11. 11.True or false: table salt does not dissolve in water. (a) True (b) False
12. 12.⚖️ 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
13. 13.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) table salt (d) glucose powder
14. 14.True or false: baking a cake is a change that can be undone. (a) True (b) False
15. 15.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
16. 16.⚖️ 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
17. 17.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
19. 19.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) melting ice (d) rusting iron
20. 20.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
21. 21.⚖️ 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 keep it the same (b) we change it (c) we measure it
22. 22.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
23. 23.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a spoon (d) a magnet
26. 26.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a balloon (c) a battery cell (d) a magnet
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
29. 29.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
30. 30.🧂 Which of these dissolves in water? (a) sand (b) baking soda (c) small pebbles (d) cooking oil
31. 31.🔍 Which is the odd one out? (a) chalk powder (b) table salt (c) food colour (d) baking soda
32. 32.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
33. 33.⚖️ 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
34. 34.True or false: sand does not dissolve in water. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a spoon (d) warm water
36. 36.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
37. 37.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
38. 38.⚖️ 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) True (b) False
39. 39.⚖️ 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) days to see crystals (b) sunny or shady place (c) the same dish (d) the amount of salt
40. 40.🔍 Which is the odd one out? (a) food colour (b) sugar (c) sand (d) table salt

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