Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 482 · 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.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
5. 5.True or false: small pebbles dissolves in water. (a) True (b) False
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a battery cell (d) warm water
7. 7.True or false: glucose powder does not dissolve in water. (a) False (b) True
8. 8.⚖️ 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 amount of water (b) the kind of salt (c) sunny or shady place (d) days to see crystals
9. 9.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
10. 10.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) small pebbles (d) baking soda
11. 11.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
12. 12.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
16. 16.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) melting ice (d) browning lemon ink
17. 17.🧺 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) a shallow dish
18. 18.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.🔍 Which is the odd one out? (a) sand (b) table salt (c) sawdust (d) chalk powder
21. 21.True or false: freezing water is a change that can be undone. (a) True (b) False
22. 22.⚖️ 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) days to see crystals (c) the amount of salt (d) the amount of water
23. 23.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
24. 24.⚖️ 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 measure it (c) we change it
25. 25.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) sugar (d) sand
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) warm water (d) salt
28. 28.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
29. 29.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) a mirror (d) salt
30. 30.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
31. 31.🧂 Which of these dissolves in water? (a) glucose powder (b) sand (c) chalk powder (d) sawdust
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a shallow dish (c) yeast (d) salt
33. 33.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
35. 35.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
36. 36.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) food colour (d) chalk powder
37. 37.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: yeast is needed for growing salt crystals. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) small pebbles (d) food colour
40. 40.⚖️ 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

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