Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 257 · 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) cannot be undone (b) can be undone
2. 2.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) browning lemon ink (d) melting ice
3. 3.True or false: chalk powder dissolves in water. (a) True (b) False
4. 4.🧈 Which of these is a change that can be undone? (a) melting ice (b) rusting iron (c) cooking an egg (d) browning lemon ink
5. 5.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
6. 6.🔍 Which is the odd one out? (a) sugar (b) sand (c) baking soda (d) table salt
7. 7.True or false: sand does not dissolve in water. (a) True (b) False
8. 8.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
9. 9.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) salt (d) a mirror
11. 11.True or false: melting butter is a change that can be undone. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) chalk powder (d) cooking oil
13. 13.True or false: melting butter is a change that cannot be undone. (a) True (b) False
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a spoon (d) a magnet
15. 15.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
16. 16.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
17. 17.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
18. 18.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
19. 19.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
22. 22.🧈 Which of these is a change that can be undone? (a) freezing water (b) cooking an egg (c) milk turning to curd (d) rusting iron
23. 23.⚖️ 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) False (b) True
24. 24.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
25. 25.⚖️ 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 measure it (c) we keep it the same
26. 26.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) freezing water (d) cooking an egg
27. 27.⚖️ 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
28. 28.True or false: baking a cake is a change that can be undone. (a) False (b) True
29. 29.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting ice (c) freezing water (d) dissolving salt
30. 30.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a balloon (d) salt
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) few or no crystals (d) it fizzes
33. 33.⚖️ 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 amount of water (c) the kind of salt (d) days to see crystals
34. 34.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
35. 35.⚖️ 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
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
37. 37.⚖️ 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 same dish (b) sunny or shady place (c) the kind of salt (d) the amount of salt
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) warm water (d) a magnet
39. 39.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sawdust (d) sugar
40. 40.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it

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