Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 852 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
2. 2.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) salt (d) a magnet
3. 3.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
4. 4.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🧂 Which of these dissolves in water? (a) small pebbles (b) glucose powder (c) cooking oil (d) sand
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) magnetic (d) frozen
8. 8.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
9. 9.True or false: glucose powder does not dissolve in water. (a) False (b) True
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
11. 11.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) melting ice (d) dissolving salt
12. 12.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
13. 13.🧂 Which of these does not dissolve in water? (a) sugar (b) baking soda (c) glucose powder (d) cooking oil
14. 14.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🔍 Which is the odd one out? (a) sand (b) sawdust (c) cooking oil (d) sugar
17. 17.⚖️ 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 measure it (b) we keep it the same (c) we change it
18. 18.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
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.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
21. 21.True or false: sawdust dissolves in water. (a) True (b) False
22. 22.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny spheres (d) tiny cubes
24. 24.⚖️ 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) the amount of salt (c) the same dish (d) days to see crystals
25. 25.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) food colour (d) small pebbles
26. 26.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
27. 27.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) cooking an egg (d) rusting iron
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a shallow dish (d) a balloon
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a balloon (d) salt
30. 30.⚖️ 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) True (b) False
31. 31.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) food colour (d) sugar
33. 33.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
34. 34.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
36. 36.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
38. 38.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.True or false: rusting iron is a change that can be undone. (a) True (b) False
40. 40.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False

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