Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 194 · 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.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
2. 2.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.True or false: food colour does not dissolve in water. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) baking soda (d) sugar
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) a piece of string (d) salt
7. 7.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
8. 8.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sugar (d) cooking oil
9. 9.True or false: freezing water is a change that can be undone. (a) False (b) True
10. 10.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) crystals grow faster (d) it turns sweet
11. 11.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) chalk powder (b) cooking oil (c) small pebbles (d) baking soda
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
15. 15.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
16. 16.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
17. 17.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
18. 18.True or false: baking soda does not dissolve in water. (a) False (b) True
19. 19.🧂 Which of these dissolves in water? (a) baking soda (b) cooking oil (c) small pebbles (d) sand
20. 20.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a piece of string (c) a mirror (d) a magnet
21. 21.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
22. 22.⚖️ 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) True (b) False
23. 23.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) cooking an egg (d) melting butter
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
25. 25.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
26. 26.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) melting ice (d) browning lemon ink
27. 27.True or false: sawdust dissolves in water. (a) False (b) True
28. 28.True or false: melting butter is a change that can be undone. (a) False (b) True
29. 29.⚖️ 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
30. 30.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
31. 31.True or false: salt is not needed for growing salt crystals. (a) True (b) False
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) salt (c) warm water (d) a shallow dish
33. 33.🧂 Which of these does not dissolve in water? (a) sawdust (b) glucose powder (c) food colour (d) table salt
34. 34.🔍 Which is the odd one out? (a) table salt (b) sugar (c) food colour (d) cooking oil
35. 35.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) milk turning to curd (d) melting butter
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) the amount of salt (d) sunny or shady place
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
38. 38.⚖️ 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 amount of salt (d) the kind of salt
39. 39.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
40. 40.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed

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