Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 263 · 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 is the odd one out? (a) chalk powder (b) sugar (c) baking soda (d) food colour
2. 2.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) cooking an egg (c) freezing water (d) folding paper
3. 3.🧈 Which of these is a change that can be undone? (a) melting ice (b) cooking an egg (c) browning lemon ink (d) rusting iron
4. 4.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
5. 5.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) baking a cake (d) melting butter
6. 6.⚖️ 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
7. 7.🛟 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
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a balloon (d) salt
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
11. 11.⚖️ 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 kind of salt (b) sunny or shady place (c) days to see crystals (d) the amount of water
12. 12.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
13. 13.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting ice (c) melting butter (d) freezing water
14. 14.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
15. 15.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
16. 16.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
17. 17.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
18. 18.⚖️ 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
19. 19.True or false: baking soda does not dissolve in water. (a) True (b) False
20. 20.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.True or false: baking soda dissolves in water. (a) True (b) False
22. 22.⚖️ 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) False (b) True
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a magnet (d) a spoon
24. 24.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) table salt (d) baking soda
25. 25.⚖️ 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 water (c) the same dish (d) sunny or shady place
26. 26.True or false: sawdust dissolves in water. (a) False (b) True
27. 27.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of water (c) sunny or shady place
29. 29.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
30. 30.True or false: dissolving salt is a change that can be undone. (a) False (b) True
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.True or false: folding paper is a change that can be undone. (a) False (b) True
33. 33.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) small pebbles (d) chalk powder
34. 34.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
35. 35.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) warm water (d) turmeric powder
37. 37.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
38. 38.🔍 Which is the odd one out? (a) food colour (b) sugar (c) glucose powder (d) cooking oil
39. 39.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
40. 40.True or false: melting ice is a change that cannot be undone. (a) False (b) True

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