Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 4 · 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 of these is a change that can be undone? (a) browning lemon ink (b) melting butter (c) cooking an egg (d) baking a cake
2. 2.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
3. 3.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
4. 4.True or false: food colour does not dissolve in water. (a) True (b) False
5. 5.⚖️ 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
6. 6.True or false: small pebbles dissolves in water. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) food colour (d) sugar
8. 8.⚖️ 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
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a mirror (d) a shallow dish
10. 10.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sawdust (d) sugar
11. 11.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) sugar (d) cooking oil
12. 12.True or false: baking soda does not dissolve in water. (a) True (b) False
13. 13.True or false: sand dissolves in water. (a) True (b) False
14. 14.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧂 Which of these dissolves in water? (a) cooking oil (b) chalk powder (c) glucose powder (d) small pebbles
16. 16.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
17. 17.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not 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 measure it (b) we change it (c) we keep it the same
19. 19.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
20. 20.True or false: freezing water is a change that can be undone. (a) False (b) True
21. 21.⚖️ 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 same dish (b) the kind of salt (c) days to see crystals (d) the amount of water
22. 22.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
23. 23.True or false: glucose powder dissolves in water. (a) True (b) False
24. 24.🧈 Can this change be undone: milk turning to curd? (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? True or false: sunny or shady place is kept the same. (a) True (b) False
26. 26.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) baking soda (d) sawdust
27. 27.🧂 Which of these dissolves in water? (a) sand (b) sugar (c) chalk powder (d) small pebbles
28. 28.⚖️ 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) sunny or shady place (b) days to see crystals (c) the amount of salt (d) the amount of water
29. 29.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
30. 30.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it fizzes (c) it turns sweet (d) few or no crystals
31. 31.🧂 Which of these does not dissolve in water? (a) sand (b) glucose powder (c) table salt (d) sugar
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a shallow dish (d) a magnet
33. 33.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) table salt (d) sawdust
34. 34.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny stars (d) tiny triangles
35. 35.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) fish make it (c) sea water evaporates (d) sand is ground up
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a balloon (c) a spoon (d) warm water
37. 37.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
38. 38.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
40. 40.⚖️ 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

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