Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 13 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) salt (d) a piece of string
2. 2.True or false: melting butter is a change that cannot be undone. (a) True (b) False
3. 3.⚖️ 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
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 salt (b) the same dish (c) days to see crystals (d) the kind of salt
5. 5.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) yeast (c) a balloon (d) turmeric powder
6. 6.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) milk turning to curd (d) freezing water
7. 7.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
8. 8.🧂 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
9. 9.⚖️ 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 amount of salt (b) sunny or shady place (c) days to see crystals
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
11. 11.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
12. 12.⚖️ 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
13. 13.🔍 Which is the odd one out? (a) baking soda (b) table salt (c) sugar (d) sawdust
14. 14.⚖️ 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 measure it (b) we change it (c) we keep it the same
15. 15.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) small pebbles (d) food colour
16. 16.⚖️ 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 measure it (c) we change it
17. 17.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) cooking oil (d) sand
18. 18.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) turmeric powder (b) a piece of string (c) salt (d) a spoon
20. 20.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) folding paper (d) cooking an egg
21. 21.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) table salt (d) baking soda
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a piece of string (d) turmeric powder
23. 23.⚖️ 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
24. 24.🧂 Which of these does not dissolve in water? (a) table salt (b) cooking oil (c) sugar (d) glucose powder
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) warm water (d) salt
26. 26.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
27. 27.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
28. 28.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
29. 29.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
30. 30.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a mirror (c) a battery cell (d) a balloon
32. 32.True or false: food colour dissolves in water. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) chalk powder (d) cooking oil
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
35. 35.True or false: folding paper is a change that cannot be undone. (a) True (b) False
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a balloon (c) a shallow dish (d) warm water
40. 40.True or false: sawdust does not dissolve in water. (a) False (b) True

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