Salt Crystal Experiment Worksheet

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

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