Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 548 · 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.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
2. 2.⚖️ 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) sunny or shady place (c) the kind of salt (d) days to see crystals
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) True (b) False
4. 4.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
5. 5.True or false: sugar does not dissolve in water. (a) True (b) False
6. 6.True or false: melting butter is a change that can be undone. (a) False (b) True
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) a spoon (d) warm water
8. 8.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) small pebbles (d) chalk powder
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) salt (d) a battery cell
10. 10.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) baking soda (d) sawdust
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
12. 12.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) cooking an egg (c) melting butter (d) freezing water
13. 13.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) chalk powder (d) cooking oil
14. 14.⚖️ 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) days to see crystals (c) sunny or shady place
15. 15.True or false: rusting iron is a change that can be undone. (a) False (b) True
16. 16.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) browning lemon ink (c) dissolving salt (d) melting ice
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
18. 18.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
19. 19.True or false: sawdust does not dissolve in water. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) sawdust (b) table salt (c) glucose powder (d) baking soda
21. 21.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.⚖️ 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
24. 24.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
25. 25.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) melting ice (d) milk turning to curd
26. 26.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
27. 27.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) folding paper (d) milk turning to curd
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) a spoon (d) warm water
29. 29.True or false: salt is needed for growing salt crystals. (a) False (b) True
30. 30.⚖️ 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
31. 31.True or false: baking soda does not dissolve in water. (a) False (b) True
32. 32.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
33. 33.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) sand (d) cooking oil
34. 34.⚖️ 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
35. 35.🔍 Which is the odd one out? (a) sugar (b) cooking oil (c) small pebbles (d) chalk powder
36. 36.🧂 Which of these does not dissolve in water? (a) sand (b) food colour (c) sugar (d) glucose powder
37. 37.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) warm water (d) a spoon
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) yeast (d) a piece of string
40. 40.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False

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