Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 700 · 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 needed for growing salt crystals? (a) a battery cell (b) a mirror (c) warm water (d) a magnet
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) magnetic (d) frozen
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) a mirror (c) a balloon (d) a magnet
4. 4.True or false: melting butter is a change that can be undone. (a) True (b) False
5. 5.⚖️ 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) True (b) False
6. 6.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
7. 7.🛟 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
8. 8.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
9. 9.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) glucose powder (d) sawdust
11. 11.⚖️ 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
12. 12.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) milk turning to curd (d) rusting iron
13. 13.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) salt (d) a piece of string
15. 15.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) baking a cake (d) melting ice
16. 16.True or false: sugar dissolves in water. (a) False (b) True
17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
18. 18.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
19. 19.⚖️ 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) True (b) False
20. 20.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) sugar (d) food colour
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a magnet (d) a shallow dish
22. 22.⚖️ 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) False (b) True
23. 23.True or false: cooking oil dissolves in water. (a) False (b) True
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
25. 25.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a balloon (d) warm water
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) dissolving salt (d) folding paper
29. 29.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
30. 30.True or false: table salt does not dissolve in water. (a) True (b) False
31. 31.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny stars (d) tiny spheres
33. 33.True or false: warm water is needed for growing salt crystals. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) sugar (b) table salt (c) food colour (d) small pebbles
35. 35.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
36. 36.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
37. 37.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
39. 39.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a mirror (d) a shallow dish

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